This paper addresses a central debate in research and policy on popula
tion and environment, namely the extent to which rapid population grow
th is associated with the massive deforestation currently underway in
the tropics. We utilize the experience of Costa Rica during the last f
orty years to illustrate what the main issues are, discuss the history
of deforestation in that country, and present results from convention
al regression methods and from the application of spatial analyses. Th
ese analyses enable us to estimate the magnitude of the relation betwe
en population and deforestation and to identify the factors that are r
esponsible for the linkage between them.