B. Adrangi et al., ANALYSIS OF THE DEREGULATION OF THE US TRUCKING INDUSTRY - A PROFIT FUNCTION-APPROACH, Journal of transport economics and policy, 29(3), 1995, pp. 233
The deregulation of the trucking industry in the US began in 1978 and
was completed in 1980. This study tests for economies of scale and pro
ductive efficiency in the trucking industry. Results indicate constant
returns to scale in the trucking industry for both the pre- and postd
eregulation periods. The policy implication of this finding is that ga
ins from mergers are likely to be moderate.