ravenstein’s laws. ernst george (e.g.) ravenstein german/american geographer and cartographer...

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Ravenstein Ravenstein s s Laws Laws

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Page 1: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

RavensteinRavenstein’’s s LawsLaws

Page 2: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

Ernst George (E.G.) RavensteinErnst George (E.G.) Ravenstein

• German/American

• Geographer AND Cartographer

• Established migration “laws” in the 1880s

Page 3: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

Ernst George (E.G.) RavensteinErnst George (E.G.) Ravenstein

• These laws form the basis for contemporary migration study!

Page 4: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

DON’T GET CONFUSED!!!

• Ravenstein – migration laws

Rubenstein – textbook author

Page 5: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

1. Most people migrate for economic reasons.

Page 6: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

2. Cultural and environmental factors induce migration (not as much as econ.)

Page 7: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

2. Cultural and environmental factors induce migration too (not as much as econ.)

In 2010 the population of New Orleans was In 2010 the population of New Orleans was almost HALF the size it was before Katrina.almost HALF the size it was before Katrina.

Page 8: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

3. Each migration flow produces a counterflow.

Page 9: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

4. Most migrants relocate a short distance within the same country.

Page 10: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

Why is this the case???

DISTANCE DECAY

Page 11: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

5. Long distance migrants head for major centers of economic activity.

Page 12: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

6. Most long-distance migrants are male.

Page 13: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

7. HOWEVER, today more women migrate than men.

Page 14: Ravenstein’s Laws. Ernst George (E.G.) Ravenstein German/American Geographer AND Cartographer Established migration “laws” in the 1880s

8. Most long distance migrants are adult individuals… not families w/ children.