This study extends the work of Akella and Greenbaum [Journal of Banking & Finance 12 (1988) 419] through the use of a much larger, nationwide sample of US saving and loan associations and supports their original finding of significant expense-preference behavior in mutual savings and loans during their original study period (1979–80). This study also provides evidence that over the time period of substantial deregulation and changes in the competitive environment in the US financial services industry, expense-preference behavior for savings and loans decreased. The results are consistent with the idea that the removal of barriers that restrict competition should improve managerial efficiency in firms that survive.