Aphid species using a defensive soldier caste offer us the opportunity to study allocation decisions by eusocial groups, without the hindrance of genetic dissimilarity between colony members, which often impair studies involving Hymenopteran or Isopteran systems. When the entire aphid clone is...

This paper presents a systematic discussion of decision analysis models for attitudes toward risk when the effects of a public policy choice extend into the distant or unbounded future. Several issues of social risk attitudes are identified and discussed. Conditions on preferences are presented...

This paper finds support for the trilemma for Norway, suggesting that the three trilemma policies - exchange rate stability, monetary independence and financial integration - have a tradeoff. Although the policy combination of exchange rate stability and monetary independence was dominant in...

This paper provides an empirical analysis of energy- and labour-productivity convergence at a detailed sectoral level for 14 OECD countries, covering the period 1970-1997. A -convergence analysis shows that the development of cross-country variation in productivity performance depends on the...