The Ramsey regression equation specification error test (RESET) furnishes a diagnostic for omitted variables in a linear regression model specification (i.e., the null hypothesis is no omitted variables). Integer powers of fitted values from a regression analysis are introduced as additional...

Spatial dependence in individual-tree diameter, and growth model residuals was characterised for an even-aged Eucalyptus pilularis (Smith) experiment in New South Wales,. Australia. The magnitude of spatial dependence changed as the dominance of competitive mechanisms and micro-site influences...

Africa is estimated to have great potential for agricultural production, but there are a number of constraints inhibiting the development of that potential. Spatial data are increasingly important in the realization of potential as well as the associated constraints. With crop production data...