type="main" xml:id="jtsa12059-abs-0001" <title type="main">Abstract</title>We propose extensions of the Box–Pierce ([Box GE, 1970]) portmanteau autocorrelation test to allow for two generalizations: (i) time series that exhibit unconditional heteroskedasticity and (ii) to test for the presence of autocorrelation only...

This paper provides an assessment of how airline code-share alliances affect the costs of the airline industry. It makes two contributions to the literature. First, it measures the effects of airline alliances by estimating a translog cost function using a panel dataset of 10 major U.S.-based...

Agriculture’s potential to reduce poverty at household level is explored for rainfed crop production in Africa and India. A literature survey of crop improvement and natural resource management interventions demonstrates that new technology can substantially increase net returns per hectare...

It is often claimed that multinational firms avoid taxes by shifting income from high-tax to low-tax countries. Using a five year panel of data for two hundred large U.S. manufacturing firms, we find that U.S. tax liability, as a fraction either of U.S. sales or U.S. assets, is related to the...