In this paper, we provide a characterization of interim inefficiency in stochastic economies of overlapping generations under possibly sequentially incomplete markets. With respect to the established body of results in the literature, we remove the hypothesis of two-period horizons, by...

This article has developed a new model of welfare dynamics under imperfect information or imperfect competition by introducing a new concept of ‘inefficient welfare equilibrium’. It assumes that an economy can be split into two virtual parts. For one part the fundamental welfare theorems are...

This article has developed a new model of welfare dynamics under imperfect information or imperfect competition by introducing a new concept of “inefficient equilibrium”. If a country suffers from poverty, then the population of the country can be divided into two groups. For one group the...

Incomplete markets provide many challenges for both investment decisions and valuationproblems. While both problems have received extensive attention in complete markets,there remain many open areas in the theory of incomplete markets. We present the resultsin three parts. In the first essay we...

Investors in financial markets face several restrictions apart from wealth constraints. The first attempt to understand these restrictions in a general competitive equilibrium framework can be traced back to Radner (1972). Here these restrictions are assumed to be given exogenously, as first...

The basic machines of macroeconomics. Ramsey, Solow, Samuelson-Diamond, RBCs, ISLM, Mundell-Fleming, Fischer-Taylor. How they work, what shortcuts they take, and how they can be used. Half-term subject. From the course home page: Course Description This half semester class presents an...

This paper derives and draws on simple formulae for the upper and lower bounds to the value of a series of risky cash flows in order to provide some instructive insights in the impact of taxation on these bounds.The formulae are based on no-arbitrage conditions in a setting that is a...

The question how to allocate capital best is as old as financial markets themselves. Maximizing expected gains only might be a good approach but cannot be the best answer because usually high expected gains are driven by highly speculative and risky investments.In this thesis we study economic...

We document widespread violations of stochastic dominance by one-month S&P 500 index call options market over 1986-2006. These violations imply that a trader can improve her expected utility by engaging in a zero-net-cost trade. We allow the market to be incomplete and also imperfect by...

An economy faces an unknown individual risk, such as the health effects of a recently discovered environmental hazard. Opinions may be widely different about the distribution of risks across the population. We study financial markets that suffice to reach efficient allocations in this situation....