Petr is a Professor of Economics at the University of New South Wales, specialising in macroeconomics with a focus on the vast heterogeneity among workers and firms. He is fascinated by how worker and firm heterogeneity interacts, influencing and being influenced by the broader economy. His work combines empirical analysis of micro-level and aggregate data with the development of theoretical and quantitative models, incorporating heterogeneous agents to address key macroeconomic questions.