Simon's model of rural-urban migration:  a proof of Johansen's conjecture.
"In Simon's 1947 model, rankings of industries by income elasticities and by technologically induced changes in input quantities were proven identical.  Johansen's conjecture that this does not extend to more than two sectors is confirmed by counter-example."
D003710:Demography; D004467:Economics; D004641:Emigration and Immigration; D005069:Evaluation Studies as Topic; D007182:Income; D007221:Industry; D008962:Models, Theoretical; D011153:Population; D011157:Population Dynamics; D012106:Research; D012959:Socioeconomic Factors
Demographic Factors; Economic Factors; Evaluation; Income; Industry; Macroeconomic Factors; Migration; Models, Theoretical; Population; Population Dynamics; Research Methodology; Rural-urban Migration; Socioeconomic Factors; World