This paper describes a pure-exchange, continuous-time economy with two heterogeneous agents and complete markets. A novel feature of the economy is that agents perceive some security returns as ambiguous in the sense often attributed to frank Knight. The equilibrium is described completely in...

Existing models in stochastic continuous-time settings assume that beliefs are represented by a probability measure. As illustrated by the Ellsberg Paradox, this feature rules out a priori any concern with ambiguity. This paper formulates a continuous-time intertemporal version of...

Rational offender models assume that individuals choose whether to offend by weighing the rewards against the chances of apprehension and the penalty if caught. While evidence indicates that rational theory is applicable to acquisitive crimes, the explanatory power for gratuitous non-fatal...

We explore the link between international stock market comovement and the degree to which firms operate globally. Using stock returns and balance sheet data for companies in 20 countries, we estimate a factor model that decomposes stock returns into global, country-specific and industry-specific...

We investigate the empirical relation between ambiguity aversion, risk aversion and portfolio choices. We match administrative panel data on portfolio choices with survey data on preferences over ambiguity and risk. We report three main findings. First, conditional on participation, ambiguity...

Under conditions of risk it makes a difference whether the discount rate is determined as an expected present or as an expected future value. This difference which is dubbed as the Weitzman-Gollier puzzle has stimulated an intensive discussion which, however, is somewhat confusing. In this paper...

Achieving low-carbon, climate-resilient (LCR) development is a policy goal of many governments today, and investment in built-infrastructure – in the energy, transport, water and building sectors – is a central part of the challenge. In the face of growing infrastructure needs and fiscal...

Individuals in most industrialized countries have to make investment decisions throughout their adult life span to save for their retirement. These decisions substantially affect their living standards in old age. Research on cognitive aging has already demonstrated several changes in cognitive...

This discussion paper resulted in a publication in 'Emerging Markets Review', 2005, 6, 238-262.<P> See also the publication in the 'Journal of Empirical Finance', 2003, 10, 1-5=132.<P> Recent empirical evidence suggests that value and momentum strategies generate significantexcess returns in emerging...</p></p>

In a world characterized by the occurrence of uncontrollable and extreme events investors are often required to make decisions on the basis of the available information. The challenge they face is how to manipulate these information sets in order to get what can lead them to the optimal...