The document discusses the ecological fallacy in relation to theories of national culture that depict cultures as uniform value dimensions. It argues that inferring characteristics of individuals or subgroups from aggregate national data is illogical and can lead to false results, as what is true at the national level is not necessarily true at lower levels within countries due to intra-country diversity. The document provides examples to illustrate the ecological fallacy and argues that claims of national culture determinism are implausible given causal complexity and varieties of culture, values, and individual psychology within countries. Overall, the document critically examines the common reliance on the ecological fallacy in theories of national culture.