economysimple model of closed economy with ricardian equivalence

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  • 8/11/2019 EconomySimple Model of Closed Economy With Ricardian Equivalence

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    SIMPLE MODEL OF CLOSED ECONOMY

    WITH THE PRESENCE OF RICARDIANEQUIVALENCE

    (Sticky Prices, Flexible Wages, Competitive Labor Market)

    Prepared for Econ 296s Project

    Tevy Chawwa

    Aditya Rachmanto

    DUKEUNIVERSITY

    SPRING 2012

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    Contents

    I. INTRODUCTION ............................................................................................................................... 1II. MODEL ............................................................................................................................................ 2

    A. GENERAL ASSUMPTIONS .............................................................................................................. 2

    B. VARIABLES AND PARAMETERS ..................................................................................................... 2

    C. BASIC EQUATIONS ....................................................................................................................... 3

    III. SIMULATION RESULTS AND ANALYSIS .......................................................................................... 7

    A. Policy: Increase in government expenditure ................................................................................. 7

    B. Policy: Increase in income tax ...................................................................................................... 8

    C. Policy: Increase in money supply .................................................................................................. 9

    D. Policy: Increase in price ................................................................................................................ 9

    E. Policy: Increase in Capital or Technology .................................................................................... 10

    IV. CONCLUSION ............................................................................................................................. 11

    APPENDIX 1 - Derivation of Differential Forms ....................................................................................... 12

    APPENDIX 2Policy Matrices ................................................................................................................ 14

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    1

    I.

    INTRODUCTION

    This model aims to analyze the interaction between several economic variables in the

    closed economy where the price is fixed, wage is flexible, and labor market is competitive. In

    goods market, it is assumed that firms have market power so they can maximize profit by fixingthe price higher than the marginal cost. Therefore, at the flexible price equilibrium, firms are

    better off if they can sell more at the prevailing price (Figure 1). As a result, a rise in demand

    with rigid prices leads to higher output.

    Firms demand of labor is determined by firms desire to meet the demand of goods.

    The quantity of labor demanded depends on the amount of goods that firms are able to sell

    (effective labor demand), as long as the real wage is not too high that it is unprofitable to meet

    the full demand (Figure 2).1Real wage is determined by the intersection between effective labor

    demand and labor supply curve. Capital is assumed to be determined from the past investment

    and it is fixed (exogenous).

    Figure 1 Supply Demand Curve Figure 2 Labor Market Curve

    In this model, we also include the Ricardian Equivalence proposition that consumers

    internalize the government's budget constraints. The proposition suggests that when

    government tries to stimulate demand by increasing government spending through deficit, the

    economic agents believe that they will have to pay higher tax in the future. Therefore they will

    save a portion of their income for future tax paying. Savings can be done through buying the

    bonds issued by the government, thus reducing their current consumption. We assume that

    only some proportion of consumers (type A) pay attention to the Ricardian Equivalence. Thus,

    their consumption will be a function of their after tax income and the government spending.

    Meanwhile, the other consumers (type B) consumption are based only on their after tax

    income.

    1 Refer to Romer,David.Advanced Macroeconomics, 4th ed. New York: McGraw Hill, 2012.

    P

    Y

    AD1

    ADAS

    LS

    Effective Ld

    L

    w

    L(Y L(Y1

    E

    E1

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    With the aforementioned assumptions, we will develop a model that will analyze the

    impact of government spending, tax, monetary policy and price increases on output,

    consumption, investment, interest rate, wage, and rental rate. There will be 3 cases: (i) 100%

    type A consumers (they pay attention to Ricardian Equivalence and have smaller marginal

    propensity to consume (mpc)); (ii) 50% type A consumers and 50% type B consumers (they do

    not care about Ricardian Equivalenceand have higher mpc); and (iii) 100% type B consumers.

    In general, the result of this model conforms to the theory that the impacts of

    government spending and changes in tax on all endogenous variables are smaller when more

    consumers pay attention to Ricardian Equivalence and have less marginal propensity to

    consume. One important difference between this model and the flexible price model is the

    wage rate in this model does not depend on the marginal productivity of labor, but it depends

    on the effective demand of labor. Thus, an increase in the demand of labor will increase the

    wage rate. Moreover, since output is determined by demand of goods, an increase in capital or

    technology will not have any impact on output. An increase in capital will only cause the

    decrease in labor demand, real wage and rental rate. Meanwhile, an increase in technology willonly cause a decrease in labor demand and real wage.

    II. MODEL

    A. GENERAL ASSUMPTIONS

    Fixed prices and fixed technological coefficient.

    Labor is demand-constrained (endogenous). Labor supply is a function of real wage.

    Capital is determined in the past (exogenous).

    There are 2 types of consumer:

    o Type A: lower mpcand pays attention to Ricardian Equivalence; and

    o Type B: higher mpcand does not pay attention to Ricardian Equivalence.

    If a consumer pays attention to Ricardian Equivalence, consumption is a function of mpc,

    income after tax and government spending. Otherwise, it is a function of mpcand income

    after tax.

    B. VARIABLES AND PARAMETERS

    Variables and parameters used in the model are described in Table 1 and Table 2. We use 9

    endogenous variables, 6 exogenous variables and 11 parameters.

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    Table 1 Description of Variables

    Table 2 Parameters

    Parameters Definition Initial Value

    Elasticity of output w.r.t. labor 0.7

    ir Elasticity of investment w.r.t. interest rate 1

    mpcA MPC for consumer type A 0.5

    mpcB MPC for consumer type B 0.8

    mr Elasticity of money demand w.r.t. interest rate 1

    kr Elasticity of kapital w.r.t. interest rate 1

    kv Elasticity of kapital w.r.t. real rate 1

    A Proportion of consumer type ACase 1: 0Case 2: 0.5

    Case 3 : 1

    B Proportion of consumer type B

    Case 1: 1

    Case 2: 0.5

    Case 3 : 0

    y Initial output 100

    lw Elasticity of labor supply to real wages 1

    C. BASIC EQUATIONS2

    We use 9 equations to define the relationship between the variables in the economy as

    follows:

    1. National Accounts

    Aggregate demand for a closed economy is given bydy c i g where c is aggregate

    consumption, iis aggregate capital investment,andgis government purchases of goods and

    2Derivation of the equations can be seen in the Appendix

    Variables Definition Unit Status

    y real income widgets per year Endogenous

    c real consumption widgets per year Endogenous

    i real investment widgets per year Endogenous

    g real gov. expenditure widgets per year Exogenousr interest rate proportion/year Endogenous

    t real tax collection widgets per year Exogenous

    P price level $/widget Exogenous

    M money stock $ Exogenous

    a Technological coefficient Unit Exogenous

    w real wage widget per person year Endogenous

    v real rental rate widgets per machine year Endogenous

    W nominal wage $ per person year Endogenous

    V nominal rental rate $ per machine year Endogenous

    L Labor Workers Endogenous

    K capital Machine Exogenous

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    services or government spending.The economy is in equilibrium when domestic production

    sy equals aggregate demand dy .

    The national accounts equation can then be written as: y c i g .

    The differential form of the national accounts equation is: y y dc di dg .

    We need the initial value of y, which we assume to be 100.

    2. Consumption Function

    Consumption consists of two parts: autonomous consumption and induced consumption.

    (i) Autonomous consumption is the consumption that would take place if current

    years income was zero. We assume that autonomous consumption is zero.

    (ii) Induced consumption is the fraction of disposable income yD (defined as income

    minus net taxes or yt) that is used for consumption. The fraction is defined from

    the parameter mpc.

    The basic Keynesian consumption function can then be written as: ( )c mpc y t

    We assume that there are two types of consumers, i.e., consumers who pay attention to

    Ricardian Equivalence and have lower mpc (Type A); and consumers who do not pay

    attention to Ricardian Equivalence and have higher mpc (Type B). Thus, we will split the

    consumption function into two parts, and we can split the total real income into two, i.e.,

    income for Type A consumer (A y ) and Type B consumer ( B y ). A denotes the

    proportion of Type A consumer in the population, and B the proportion for Type B

    consumer.

    Furthermore, since we assume the presence of Ricardian Equivalence, and that only Type A

    consumer is aware of this effect, then we can formulate the disposable income as follows:(i)

    Type A consumer: according to the concept of Ricardian Equivalence, when the

    government increases its spending, consumers will not increase their consumption,

    since they are aware that the government is financing its spending from debt, and in

    the future the government will have to pay the debt by increasing tax. Hence the

    consumer will save a portion of its current income to pay the future tax. One of the

    means of consumer savings in the concept of Ricardian Equivalence is by buying

    government bonds, which means that the consumers are financing the government

    spending. For this reason, the disposable income is the fraction of total income

    minus net taxes minus government spending ( )A y t g .

    (ii) Type B consumer: since we assume that Type B consumer are not aware of

    Ricardian Equivalence, we can formulate the disposable income as the fraction of

    total income minus tax ( )B y t .

    Since each type of consumers has their own mpc, we will denote Ampc for Type A

    consumer, and Bmpc for Type B consumer, where we assume Ampc < Bmpc .

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    The consumption function can then be written as:

    mpc ( ) mpc ( )A A B Bc y t g y t .

    The differential form of the consumption function is:

    A A B Bdc mpc y y dt dg mpc y y dt .

    We need the initial values forAmpc and Bmpc , which we will assume to be 0.5 and 0.8,

    respectively. This is based on the assumption that Type A consumer favors investment more

    than Type B consumer, hence they are aware of the Ricardian Equivalence.

    We also need the initial values forA and B the proportion of Type A and Type B consumer

    in the population. We will assume two cases of these shares:

    Case 1: No Type A consumer in the population : A : 0% ; B : 100%.

    Case 2: Equal proportion of Type A and B consumer : A : 50% ; B : 50%.

    Case 3: No Type B consumer in the population : A : 100% ; B : 0%.

    3.

    Investment Function

    The real investment, i,depends negatively on the interest rate, r. Investmentwilldecrease

    as the present discounted return from any investment project falls with an increase in the

    cost of borrowing, r.

    The investment function can then be written as: ( ) ri ri i r e .

    The differential form of the investment function is: .rdi i dr .

    The parameter ir measures the elasticity of investment w.r.t. interest rate, and is assumed

    to be 1. This means that investment is very dependent on interest rate. A 1 unit increase in r

    will lead to 1 unit decrease in i.

    4.

    Money Demand

    The money market is in equilibrium when the supply of money, MS, is equal to the demand

    for money, MD. MS is a policy decision of the central bank. MD is assumed to reflect two

    principal motives for holding money:

    (i) the transactions motivefor holding money, meaning that MDincreases when output

    y increases.

    (ii)

    The store of wealth motive for holding money, meaning that money shouldcompete with other assets as a store of wealth. Holding money has an opportunity

    cost, i.e., the rate of return paid by other assets, r. Hence, MD decreases when r

    increases.

    We will use Cagan money demand function, which also depends on y and r. We assume that

    the elasticity of money demand w.r.t output ( ym ) is 1.

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    The money demand function can then be written as: ( , ) y rm m rM f y r y e

    P

    .

    The differential form of the money demand is:

    rM P y m dr

    The parameter mr measures the elasticity of money demand w.r.t. interest rate, and isassumed to be 1. This means that money demand is very dependent on interest rate.

    5.

    Production Function

    Production is assumed to be a Cobb-Douglas function with two factor inputs, capital and

    labor, and a technological coefficient.

    The production function can then be written as:1

    y aK L .

    The differential form of the production function is:

    (1 )y a K L

    The parameter measures the elasticity of output w.r.t. labor, and is assumed to be 0.7.

    This means that elasticity of output w.r.t. capital is 0.3.

    6. Labor Supply

    Since labor is endogenous, then the amount of effective labor force is determined from the

    intersection between labor supply (LS) curve and labor demand (LD) curve in the equilibrium.

    LDis determined from the production function. LSis a function of the real wage. If real wage

    increases, then labor supply will increase.

    It is worth noting that the equilibrium real wage is not the marginal product of labor

    anymore, since real wage is now a function of LS.

    The labor supply function can then be written as: wlWL f f w w

    P

    .

    The differential form of the labor supply is: wL l w .

    The parameter lw measures the elasticity of labor force w.r.t. real wage, and is assumed to

    be 1.

    7. Nominal Wage

    Nominal wage is the dollar value of real wage, which is defined as the product of real wage

    and price.

    The nominal wage function can then be written as: W w P . The differential form of the nominal wage is:

    W w P .

    8. Real Rental Rate

    Real wage is defined as the marginal product of capital (MPK) from the Cobb-Douglas

    production function.

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    The real rental rate function can then be written as: (1 )y

    v a K LK

    .

    The differential form of the real rental rate is:

    ( )v a K L .

    9.

    Nominal Rental RateNominal rental rate is the dollar value of real rental rate, which is defined as the product of

    real rental rate and price.

    The nominal rental rate function can then be written as: V v P .

    The differential form of the nominal rental rate is:

    V v P .

    III.

    SIMULATION RESULTS AND ANALYSIS

    A.

    Policy: Increase in government expenditure

    The effect of 1 % increase in government expenditure for each case is presented in

    Figure 3. In general, this policy will increase output, consumption, labor, real and nominal wage

    rate, interest rate, real and nominal rental rate. Furthermore, the increase in interest rate will

    decrease investment which popularly called as crowding out effect. In line with theory, the

    effect of this policy on economy is smaller when more people pay attention to Ricardian

    equivalence proposition.

    Figure 3 Impact of Increase in Government Expenditure

    Note: For graphs purposes, due to the high values of dc, it is calibrated so that dc = dc / y = dc / 100

    Explanations:

    Increase in government expenditure will increase the aggregate demand. Therefore, at fixed

    price, firms will increase their output to meet the demand. To produce more output, firms need

    more labor, then the demand of effective labor L^ increases. Since sensitivity of labor supply

    with respect to real wage = 1, then the real wages (when labor demand meets labor supply)

    increases. Since price is fixed, the nominal wage W increases.

    The increase in total output y^ makes the quantity of money demanded increases. Holding

    M and P constant, interest rate must increases to compensate the excess demand of money.

    -0.060

    -0.040

    -0.020

    0.000

    0.020

    0.040

    0.060

    0.080

    y^ dc di L^ dr W^ w^ v^ V^

    A= 0%; B= 100% A=50% ; B=5 0% A=100 %; B= 0%

    A= 0%; B= 100% A=50%; B=50% A=100%; B= 0%

    y^ 0.0476 0.0208 0.0098

    dc 3.810 1.104 -0.010

    di -0.048 -0.021 -0.010L^ 0.068 0.030 0.014

    dr 0.048 0.021 0.010

    W^ 0.068 0.030 0.014

    w^ 0.068 0.030 0.014

    v^ 0.048 0.021 0.010

    V^ 0.048 0.021 0.010

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    The increase in interest rate makes investment spending decrease. The decrease in investment

    causes by the increase of government spending explains the crowding out effect.

    Since real rental rate is defined as the marginal product of capital and capital is

    constant, then increase in output makes real rental rate increases. Holding P constant, the

    nominal rental rate must increase.

    Increase in output can be seen as increase in income, therefore normally consumption

    should be increase. However, since consumers type A believe of ricardian equivalence then they

    will decrease their consumption. Aggregately when proportion of consumer type A increase,

    then the impact of government spending on consumption will be less and could be negative

    (case 3).

    B. Policy: Increase in income tax

    The effect of 1% increase in income tax is illustrated in Figure 4. In general, the effect of this

    policy is contrary with the effect of government spending. Increase in income tax policy willdecrease output, consumption, labor, real and nominal wage rate, interest rate, real and

    nominal rental rate. Decrease in interest rate will increase investment. The effect of this policy is

    higher when more consumers that have higher marginal propensity to consume (case 1).

    Remember that consumers type A have higher mpc than consumer type B.

    Figure 4 Impact of Increase in Tax

    Note: For graphs purposes, due to the high values of dc, it is calibrated so that dc = dc / y = dc / 100

    Explanation

    When the government increases income tax, consumers will decrease their consumption

    therefore aggregate demand will decreases. Thus, the firms will decrease their production y^.Decline in production will make the firms reduce their labor, then the demand of effective labor

    L^ decreases and this impact to the decrease in the real wages. Since price is fixed, the decrease

    in real wage will make nominal wage W decreases.

    The decrease in total income makes the quantity of money demanded falls. Holding M and P

    constant, interest rate must to compensate the excess supply of money. The decrease in

    interest rate makes firms investment spending increases.

    -0.060

    -0.040

    -0.020

    0.000

    0.020

    0.040

    0.060

    y^ dc di L^ dr W^ w^ v^ V^

    A= 0%; B= 100% A=50%; B=5 0% A=100 %; B= 0%

    A= 0%; B= 100% A=50%; B=50% A=100%; B= 0%

    y -0.038 -0.018 -0.010

    dc -3.848 -1.824 -0.990

    di 0.038 0.018 0.010

    L^ -0.054 -0.026 -0.014dr -0.038 -0.018 -0.010

    W^ -0.054 -0.026 -0.014

    w^ -0.054 -0.026 -0.014

    v^ -0.038 -0.018 -0.010

    V^ -0.038 -0.018 -0.010

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    Since capital is constant and output decrease, the marginal product of capital or real rental

    rate will decreases. Holding P constant, the nominal rental rate must decreases.

    C. Policy: Increase in money supply

    The effect of 1 % in money supply is illustrated in Figure 5. In general, this policy will

    increase output, consumption, investment, labor, real and nominal wage, real and nominal

    rental rate. Furthermore, it will decrease interest rate. The impact of monetary policy on output

    and consumption the effect of monetary policy is higher when more consumers have higher

    marginal propensity to consume (case 1).

    Figure 5 Impact of Increase in Money Supply

    Note: For graphs purposes, due to the high values of dc, di and dr, it is calibrated so that dc=dc/100, di=di/10

    and dr= dr/10

    Explanation

    1% increase in money supply will decrease the interest rate and increase aggregate

    demand. The increase in aggregate demand will make the firms increase their production. The

    decreases in interest rate make firms investment spending increases.

    Increase in production will make the firms add more labor, then the demand of effective

    labor increases and this impact to the increase in the real wages. Since price is fixed, the inrease

    in real wage will make nominal wage W increases.

    Since the capital is constant, then increase in the output will increase the marginal

    product of capital or real rental rate. Holding P constant, the nominal rental rate must increase.

    Increase in output can be seen as increase in income, therefore consumption will be

    increase. When consumers type A (higher mpc) is more dominant, the effect of monetary policy

    is higher.

    D. Policy: Increase in price

    Suppose the firms want a higher profit and they increase price by 1%. The effect of this

    action is illustrated in figure 6. In general, this policy will decrease output, consumption,

    investment, labor, real wage and real rental rate. Furthermore, it will increase interest rate,

    nominal wage and nominal rental rate of capital. The impact of price on output and

    -0.150

    -0.100

    -0.050

    0.000

    0.050

    0.100

    0.150

    y^ dc di L^ dr W^ w^ v^ V^

    A= 0%; B= 100% A=50%; B=5 0% A=100 %; B= 0%

    A= 0%; B= 100% A=50%; B=50% A=100%; B= 0%

    y 0.048 0.028 0.020

    dc 3.810 1.806 0.980

    di 0.952 0.972 0.980

    L^ 0.068 0.040 0.028

    dr -0.952 -0.972 -0.980W^ 0.068 0.040 0.028

    w^ 0.068 0.040 0.028

    v^ 0.048 0.028 0.020

    V^ 0.048 0.028 0.020

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    consumption is higher when more consumers have higher marginal propensity to consume (case

    1)

    Figure 6 Impact of Increase in Price

    Note: For graphs purposes, due to the high values of dc, di, dr,W^ and V^ it is calibrated

    so that dc=dc/100, di=di/10, dr= dr/10, W^=W^/10 and V^=V^/10

    Explanation

    Increase in price will decrease aggregate demand and increase the interest rate. The

    decrease in aggregate demand will make the firms decrease their production. The increases in

    interest rate make firms investment spending decreases. Decrease in output can be seen as

    decrease of income, therefore consumption will decrease.

    Lower production will make the firms reduce labor, then the demand of effective labor

    decreases and this impact to the decrease in the real wages. Since price is increase higher than

    the decrease in real wage, the nominal wage W will increases.

    Since the capital is constant meanwhile output decrease, then the marginal product of

    capital will decrease and real rental rate decreases.

    E. Policy: Increase in Capital or Technology

    Increase in capital or technology will not have impact to output, since output is demand-

    constrained. Therefore, changes in those variable wouldnt impact consumption, investment

    and interest rate. Increase in capital and technology will make the demand of labor decrease,

    because number of output is constant. Therefore labor and real wage will decrease. On the

    other side, increase in capital will decrease the rental rate. Since price is constant, then nominal

    wage and nominal rental rate will decrease. The impact of 1% increase in capital and 1%

    increase in technology can be seen in Figure 8.

    -0.150

    -0.100

    -0.050

    0.000

    0.050

    0.100

    0.150

    y^ dc di L^ dr W^ w^ v^ V^

    A= 0%; B= 100% A=50%; B=5 0% A=100 %; B= 0%

    A= 0%; B= 100% A=50%; B=50% A=100%; B= 0%

    y^ -0.048 -0.028 -0.020dc -3.810 -1.806 -0.980

    di -0.952 -0.972 -0.980

    L^ -0.068 -0.040 -0.028

    dr 0.952 0.972 0.980

    W^ 0.932 0.960 0.972

    w^ -0.068 -0.040 -0.028

    v^ -0.048 -0.028 -0.020

    V^ 0.952 0.972 0.980

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    Figure 7 Impact of Increase in Capital and Technology

    IV. CONCLUSION

    The economic model that we develop can successfully explain the interaction between

    economic variables in a fixed price, flexible wage and competitive labor market. Several

    important conclusions from the simulation results are as follows:

    1. An increase in government spending will increase output, consumption, labor, real and

    nominal wage rate, interest rate, real and nominal rental rate. Furthermore, the increase in

    interest rate will decrease investment (the crowding out effect).

    2.

    The impact of government spending and tax on all endogenous variables are smaller when

    more consumers pay attention to Ricardian Equivalenceand have less marginal propensity to

    consume.

    3. An increase in income tax policy will decrease output, consumption, labor, real and nominal

    wage rate, interest rate, real and nominal rental rate. A decrease in interest rate will increase

    investment.

    4. An increase in money supply will increase output, consumption, investment, labor, real and

    nominal wage, real and nominal rental rate. It will also decrease interest rate.

    5. An increase in price will decrease output, consumption, investment, labor, real wage and real

    rental rate. It will also increase interest rate, nominal wage and nominal rental rate of capital.

    6. The impact of changes in tax, money supply and price on output is higher when consumers

    with high mpc are dominant in the economy.

    7.

    Since output is determined by demand, an increase in capital or technology will not have any

    impact on output. An increase in capital will only cause a decrease in labor demand, real

    wage and rental rate. Meanwhile, an increase in technology will only cause a decrease in

    labor demand and real wage.

    -1.600

    -1.400

    -1.200

    -1.000

    -0.800

    -0.600

    -0.400

    -0.200

    0.000

    y^ dc di L^ dr W^ w^ v^ V^

    Impact of Techonology Impact of Kapital

    a^ K^

    y 0.000 0.000

    dc 0.000 0.000

    di 0.000 0.000

    L^ -1.429 -0.429

    dr 0.000 0.000

    W^ -1.429 -0.429w^ -1.429 -0.429

    v^ 0.000 -1.000

    V^ 0.000 -1.000

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    APPENDIX 1 - Derivation of Differential Forms

    1. National Accounts

    .

    y c i g

    y y y ydy dc di dg y c i g

    y y dc di dg

    2. Consumption function

    mpc ( ) mpc ( )

    A A B B

    A A

    B B

    A A

    B B

    A A

    B B

    c y t g y t

    c c cdc mpc dy dt dg y t g

    c cmpc dy dt

    y t

    mpc dy dt dg

    mpc dy dt

    dc mpc y y dt dg

    mpc y y dt

    3. Investment function

    .

    r

    r

    r

    i r

    i r

    r

    i r

    r

    i i r e

    idi dr

    r

    i e dr di

    i e

    di i dr

    4. Money demand

    1

    ( , )

    Let : equals 1, then

    y r

    y r

    y y yr r r

    y r

    m m r

    m m r

    m m mm r m r m r

    y r

    m m r

    y r

    y

    r

    Mf y r y e

    P

    M Py e

    M M MdM dP dy dr

    P y r

    y e dP m Py e dy m Py e drdM

    M Py e

    dP dym m dr P y

    m

    M P y m dr

    5.

    Production function

    1

    1

    1 1

    (1 )

    (1 )

    (1 )

    y aK L

    y y ydy da dK dL

    a K L

    K L da a K L dK

    a K L dL

    dy da dK dL

    y a K L

    y a K L

    6.

    Labor Supply

    1

    1

    w

    w

    w

    w

    l

    l

    w

    l

    w

    l

    w

    WL f f w w

    P

    dL l w dw

    l w dwdL

    L w

    L l w

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    7. Nominal wage

    W w P

    W WdW dw dP

    w P

    dW dw dP

    W w P

    W w P

    8. Real rental rate

    1

    1

    (1 )

    (1 ) (1 )

    (1 )

    ( )

    yv a K L

    K

    v v vdv da dK dLa K L

    K L da a K L dK

    a K L dL

    dv da dK dL

    v a K L

    v a K L

    9.

    Nominal rental rate

    V v PV V

    dV dv dP v P

    dV dv dP

    V w P

    V v P

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    APPENDIX 2 Policy Matrices

    Proportion of consumer type A = 0%, B=100%

    dg dt M^ P^ a^ K^

    y^ 0.048 -0.038 0.048 -0.048 0.000 0.000

    dc 3.810 -3.848 3.810 -3.810 0.000 0.000

    di -0.048 0.038 0.952 -0.952 0.000 0.000

    L^ 0.068 -0.054 0.068 -0.068 -1.429 -0.429

    dr 0.048 -0.038 -0.952 0.952 0.000 0.000

    W^ 0.068 -0.054 0.068 0.932 -1.429 -0.429

    w^ 0.068 -0.054 0.068 -0.068 -1.429 -0.429

    v^ 0.048 -0.038 0.048 -0.048 0.000 -1.000

    V^ 0.048 -0.038 0.048 0.952 0.000 -1.000

    Proportion of consumer type A = 50%, B=50%dg dt M^ P^ a^ K^

    y^ 0.021 -0.018 0.028 -0.028 0.000 0.000

    dc 1.104 -1.824 1.806 -1.806 0.000 0.000

    di -0.021 0.018 0.972 -0.972 0.000 0.000

    L^ 0.030 -0.026 0.040 -0.040 -1.429 -0.429

    dr 0.021 -0.018 -0.972 0.972 0.000 0.000

    W^ 0.030 -0.026 0.040 0.960 -1.429 -0.429

    w^ 0.030 -0.026 0.040 -0.040 -1.429 -0.429

    v^ 0.021 -0.018 0.028 -0.028 0.000 -1.000

    V^ 0.021 -0.018 0.028 0.972 0.000 -1.000

    Proportion of consumer type A = 100%, B=0%

    dg dt M^ P^ a^ K^

    y^ 0.0098 -0.010 0.020 -0.020 0.000 0.000

    dc -0.010 -0.990 0.980 -0.980 0.000 0.000

    di -0.010 0.010 0.980 -0.980 0.000 0.000

    L^ 0.014 -0.014 0.028 -0.028 -1.429 -0.429

    dr 0.010 -0.010 -0.980 0.980 0.000 0.000

    W^ 0.014 -0.014 0.028 0.972 -1.429 -0.429

    w^ 0.014 -0.014 0.028 -0.028 -1.429 -0.429

    v^ 0.010 -0.010 0.020 -0.020 0.000 -1.000

    V^ 0.010 -0.010 0.020 0.980 0.000 -1.000