Sayer's early work was on radical understandings of uneven development in Western societies, and urban and regional change. His book with Kevin Morgan,
Microcircuits of Capital (1988), was a result. He reworked aspects of political economy and Marxist thought (
Radical Political Economy: A Critique, 1995). In the late 1990s he incorporated a cultural understanding of political-economic change, building on
Pierre Bourdieu's work on economic and cultural capital.
The Moral Significance of Class (2005) analyses the ethical aspects of people's experience of class inequalities: how people value one another and themselves. Since then most of his work has been on moral economy and its links to political economy, and on the ethical dimension of everyday life. These interests are reflected in his
Why Things Matter to People: Social Science, Values and Ethical Life (2011), and his ''Why we can't afford the rich'' (2014). He is perhaps best known for his effort to recast the philosophy and methodology of the social sciences, developing
critical realism as a philosophy of and for the social sciences (
Method in Social Science, 1984, and
Realism and Social Science, 2000). Critical realism argues for "theoretically informed concrete research". Debates about Sayer's approach have been extensive, particularly regarding his view that empirical modelling techniques in the social sciences cannot show real causal relationships, and his dissatisfaction with social constructionism and postmodernism. == Moral economy ==