We review the changes in modelling strategy and econometric methodology when estimating a firm-level investment equation on panel data during the past twenty years, in order to assess which of these changes result from new estimation methods and changes in the practice of panel data...

Do world-leading researchers from developing countries contribute to upgrading locally, or do they disengage from the local context? The paper investigates the scientific collaborations of university-based science and technology researchers in the database of the South African National Research...

The aim of this paper is to study emergent patterns of demand when there are social interactions between different consumers. Specially, our concern is with the case in which consumers' preferences are influenced by the consumption behaviour of others.