Research in population trends is reviewed in this report. The background of population research is examined in reference to methodology and costs. Research conducted by demographers and other population scientists are compared in four areas: fertility, mortality, migration and population redistribution, and population composition and change. Future directions for each of these areas are also discussed, taking into account such issues as methodology, timing, decisionmaking, and ethnicity. A list of 139 references is appended. (FG)