Some general theory of immigration's consequences, 12. -- The demographic dimensions of immigration into the United States, 22. -- Behavioral characteristics of immigrants, 53. -- Effects of immigrants upon the public coffers, 105. -- How much welfare and public services do immigrants (and natives) use?, 132. -- The effects on technology, productivity, and native human capital, 165. -- Impacts upon natural resources and the environment, 187. -- The overall effect of immigrants upon native's standard of living, 194. -- Job displacement : Theory of immigrats and native unemployment, 208. -- Empirical studies of labor - market effects, 225. -- The effects of immigrants upon income distribution and prices, 253. -- The sending countries, the immigrants themselves, and the world as a whole, 266. -- The "question" of illegal immigrants and guestworkers, 277. -- Evaluation of immigration policies, 307. -- Conclusions and summary of main findings, 337