On the Non-Existence of Redundant Options

In a seminal paper, Ross (Q J Econ 90:75–89, 1976) shows that if security markets are resolving, then there exist (non-redundant) options that generate complete security markets. Complementing his work, Aliprantis and Tourky (2002) show that if security markets are strongly resolving and the number of primitive securities is less than half the number of states, then every option is non-redundant. Our paper extends Aliprantis and Tourky’s result to the case when their condition on the number of primitive securities is not imposed. Specifically, we show that if there exists no binary payoff vector in the asset span, then for each portfolio there exists a set of exercise prices of full measure such that any option on the portfolio with an exercise price in this set is non-redundant. Since the condition that there exists no binary payoff vector in the asset span holds generically, redundant options are thus rare. I am grateful to an anonymous referee for very helpful comments. Research support from the School of Business at The George Washington University is gratefully acknowledged     

When Galbraith Frightened Conservatives: Power in Economics,Economists’ Power,and Scientificity

In this article, I first expound John Kenneth Galbraith’s general theory of power. Galbraith always took into account phenomena of power in economics, and shed light on the power of economists in particular. I then show how the reaction of conservatives to the broadcasting of the Age of Uncertainty highlights the relevance of Galbraith’s theory. Letters exchanged by conservative Lords in an effort to fight against Galbraith’s ideas paradoxically illustrate his theory. This leads to questions about the status of economists, popularizers, and experts. Finally, I argue that convictions have a crucial role in scientific production, and that Robert Solow’s distinction between the “serious scholars” and the proselyte economist is irrelevant because of its incapacity to understand how economists produce knowledge.     

Supply management and household poverty in Canada

The regulation of the Canadian dairy and poultry industries through production quotas (also known as supply management) is widely believed to result in higher consumer prices that disproportionately impact poorer households. Using the most recent Survey of Labour and Income Dynamics (Statistics Canada 2013), we estimate the number of Canadians pushed below the poverty/low-income threshold as a result of this policy as ranging between 133,000 and 189,000 individuals.     

On the European Responsibility in the Agricultural Multilateral Trade Negotiations: Modelling the Impacts of the Common Agricultural Policy

The present round of multilateral trade negotiations is still deadlocked over agricultural trade. The European Union (EU) is urged by its trading partners to open its agricultural markets. Economic evaluations of trade liberalisation scenarios unanimously conclude that a substantial opening of agricultural markets is required for a successful (welfare‐improving) Doha Round. In this paper, we perform new evaluations to identify precisely the contributions of the European farm policy and to examine the robustness of these evaluations in the representation of this complex policy. Using the same specifications as in major previous studies, our first simulations show that the EU has a major responsibility in delivering significant gains to the developing countries. On the other hand, when we conduct the same experiments with a more relevant calibration and modelling of the European farm policy instruments, the gains that these developing countries may reap from the EU liberalisation are considerably reduced. Accordingly the current charge against the EU is simply inopportune.