-study of the structure and dynamics of human populations
-3 crucial factors: mortality (life expectancy), fertility and migration.
-inscriptions allow us to work out mortality- BUT have urban bias, and ages are rounded up/down.
-comparative data for mortalilty- anything under 20, and population cannot reproduce itself. 18th cent. spain- life expectancy av. 27 years. rome was probably 20-30
-high mortality- 1/3 die before 10y/o
-likely the average roman woman gave birth 5 times
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