Browsing by Issue Date, starting with "2007-05"
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- Teaching Keynes’s principle of effective demand within the real wage vs. employment spacePublication . Andini, CorradoThis paper reviews several models for teaching Keynes’s principle of effective demand within the real wage vs. employment space and explores a simple extension of a model originally proposed by Lavoie (2003).
- Technology adoption deterrence through learning and capacity investmentPublication . Cabral, RicardoThis paper analyzes an incumbent’s use of learning and manufacturing capacity investment to deter or accommodate adoption of a new technology by a potential competitor, using a perfect state-space equilibrium concept and a model motivated by the semiconductor industry. The results indicate that, under typical market conditions, an incumbent leaves some capacity idle after learning-by-doing cost reductions have been achieved, and an incumbent that follows an accommodation strategy invests in more learning than a monopoly that does not face the threat of entry. Finally, the analysis suggests that investments in learning and manufacturing capacity allow early adopters to credibly alter strategies (and equilibria) of the adoption game in their favor vis-à-vis followers.
- Biodiversity patterns of cavernicolous ground-beetles and their conservation status in the Azores, with the description of a new species: Trechus isabelae n. sp (Coleoptera : Carabidae : Trechinae)Publication . Borges, Paulo A. V.; Oromí, Pedro; Serrano, Artur R. M.; Amorim, Isabel R.; Pereira, Fernando E. A.Diversity patterns of cave and epigean Trechinae (Coleoptera, Carabidae) from the Azores (Portugal) are reported based on recently standardized sampling protocols in different habitats of this geologically young and isolated volcanic archipelago. A total of 10 species are studied, including Trechus isabelae n. sp., collected in a volcanic pit on São Jorge, one of the nine islands of the Azores. This new Trechus species represents the eighth species of Trechinae described from the underground environment of the Azores. An identification key for the Azorean species of Trechus is provided along with additional information per species on their distribution and conservation status in the archipelago. Possible reasons for the different degrees of adaptation to the conditions of the underground environment exhibited by Trechinae are also discussed.