Mining and fishing are both extractive industries, although one resource is renewable and the other is not. Miners and fishers pursue financial objectives, although their objectives may differ. In both industries financial performance is influenced by productivity and prices. Finally, in both...

We consider productivity measurement based on radial DEA models with multiple constant inputs. We show that in this case the Malmquist and the Hicks- Moorsteen productivity indices coincide and are multiplicatively complete, the choice of orientation for the measurement of productivity change...

Recently Diewert (2014) decomposed cost change into the product of four drivers. He then combined three of these drivers with a novel measure of returns to scale to decompose profitability change. We use an implicit Konus input quantity index to show that his expression for profitability change...

Aquatic ecosystems are vulnerable to threats from human activity. Urban stream ecosystems are especially vulnerable to urbanisation of surrounding land use, and interest continues to grow in improving the health of urban streams. We study 30 sites along two highly urbanised streams in Brisbane,...

The product test asks the product of the volume and price index numbers to equal the corresponding value change. The literature treats the product test as a requirement. We treat it as a hypothesis, and we provide an empirical test.

The Malmquist productivity index has many attractive features. One is that it decomposes into a technical efficiency change index and a technical change index. Under constant returns to scale, its technical efficiency change index has been decomposed into a "pure" technical efficiency change...