Theory and international evidence suggest that firms at the New Zealand productivity frontier may be especially important for diffusion of knowledge from global frontier, acting as a conduit new technologies ideas to flow into domestic economy. We identify NZ in novel way is robust some sources measurement error, criticism label dependent on arbitrary assumptions. show economic activity concent...

This paper proposes an alternative approach for efficiency analysis when a set of DMUs uses interval scale variables in the productive process. To test the influence of these variables, we present a general approach of deriving DEA models to deal with the variables. We investigate a number of performance measures with unrestricted-in-sign interval and/or interval scale variables.

This research examines changes in word retrieval and naming during a developmental period in which there is a substantial increase in productive vocabulary. That increase generally occurs when children have between 50 to 150 words in productive vocabulary. We examined children's naming errors in two studies for what these errors could tell us about the emerging lexicon. The method we used for e...