States that rapidly deregulated banking sharply expanded credit availability. More money available to borrow led to increased demand for goods and services, particularly from individuals who bought nontradable goods such as real estate and services. Wages and employment grew in areas such as construction, the service industries, and public services.
But the regulatory easing magnified the effects of the 1990–91 recession in early-deregulation states, the researchers find. With household debt high, consumers had to cut back, and they did so in the nontradable sectors that had seen growth. “Credit supply shocks that operate primarily on the demand side of the economy may lead to an amplified business cycle, boosting demand during the expansion but leading to a more severe subsequent contraction,” write the researchers, who also find a link between the rise in a state’s household debt prior to the recession and the severity of the recession in that state.