Natacha Postel-Vinay is an economic historian mainly interested in financial history. Her research explores monetary and banking phenomena, whether domestic or international. She looks at how finance affects the business cycle, in particular in contributing to economic crises and worsening downturns. She has special expertise in the financial history of the Great Depression, in particular the causes of US bank failures in the 1930s. She often deals with issues of mortgage and household debt. She also has an interest in public finance, fiscal capacity, and the question of the impact of fiscal austerity on the economy.
Beyond the 19th and 20th centuries, she teaches financial history from 1600. And beyond financial history, she also has an interest in processes of long-run development such as the Industrial Revolution.