This paper examines the contributions of technical change, scale economies, regulation, and efficiency on productivity growth in the interstate natural gas pipeline industry. Following Bauer (1990) productivity growth for firms subject to regulation is decomposed into technical change, scale...

Hyperbolic measures of efficiency and productivity change with respect to a graph representation of production technology allow researchers to consider output and input dimensions simultaneously in measuring producer performance. Hyperbolic efficiency measures have been proposed, but empirical...