Geoffrey A. Jehle




Flash -- Vassar and TSE launch exchange program. Read about it here

I am Professor of Economics in the Department of Economics at Vassar College in Poughkeepsie, New York.

In the Fall semester, I will be teaching:


I also serve as faculty in the Program in Economic Policy Management (PEPM) at Columbia University's School of International and Public Affairs (SIPA).

In the Fall semester I will be teaching:

When Vassar is not in session, I like spending time at my home in France.



How to reach me:

Email: jehle@vassar.edu

Phone: (845) 437-5210
Fax:     (845) 437-7576

Office Location: Blodgett 138

Hours:

Monday & Wednesday, 1:30--3:00pm
And by appointment


Biographical Information

Degrees Awarded: Ph.D. Princeton University, 1983; M.A. Princeton University, 1979; B.A. Kalamazoo College, 1975.

Honors/Awards: Phi Beta Kappa; Fulbright Senior Scholar, Foreign Trade University of Vietnam, 2013, and Universiti Sains Malaysia, 2001; Outstanding Teacher Award, SIPA, 2009, and Outstanding Teaching Award, SIPA/PEPM, 2007, Columbia University; Dana Fellow, Yale University, 1991; Iddo Sarnat Award for Best Paper of the Year, 1987, European Finance Association and Journal of Banking and Finance; Bourse Chateaubriand, Government of France, 1984.

Publications: "Instruments of Trade Policy," in A. Lukauskas, R. Stern and G. Zanini, Eds., Handbook of Trade Policy for Development, Oxford University Press, 2013; Advanced Microeconomic Theory, 3rd. Ed. (with Philip J. Reny), Pearson, 2011; "On the Geometry of Constant Returns," Journal of Economic Education, Winter 2002; "On Fringe Benefits and Layoffs," (with Marc O. Lieberman), Journal of Post-Keynesian Economics, Winter 1997-98, "Zakat and Inequality: Some Evidence from Pakistan," Review of Income and Wealth, 1994; Reply to a comment by Fitzroy & Hart, European Journal of Political Economy, 1994; "Inequality in Pakistan," Pakistan Journal of Applied Economics, 1994; "Optimal Implicit Contracts and the Choice Between Worksharing and Layoffs," (with M. O. Lieberman), European Journal of Political Economy, 1992; "An Islamic Perspective on Inequality in Pakistan", Pakistan Development Review, 1992; Advanced Microeconomic Theory, Prentice Hall, 1991; "A Note on Some Theorems in The Theory of International Trade," Eastern Economic Journal, 1989; "Regulation and The Public Interest in Banking," Journal of Banking and Finance, 1986; "Individual Welfare and the Demand for Financial Instruments," Southern Economic Journal 1984.


Current Research Interests: Poverty and inequality, social choice and welfare.


Send bugs or comments to Geoffrey Jehle <jehle@vassar.edu>
<p> In the Fall semester (2006/2007) I am on leave. <ul> <ul> <li> <a href="http://irving.vassar.edu/faculty/gj/201cat.htm">Economics 201, Microeconomic Theory</a> <p> <li> <a href="http://catalog.vassar.edu/preview_course_nopop.php?catoid=2&coid=2605">Economics 201, Microeconomic Theory</a> <p>        <a href="http://irving.vassar.edu/faculty/gj/201/econ201.htm">Click here for 201 course material.</a> </ul> <li> <a href="http://catalog.vassar.edu/preview_course_nopop.php?catoid=2&coid=2605">Economics 201, Microeconomic Theory </a> <li> <a href="http://catalog.vassar.edu/preview_course_nopop.php?catoid=2&coid=2625">Economics 345, International Trade Theory and Policy</a> <li> <a href="http://catalog.vassar.edu/preview_course_nopop.php?catoid=6&coid=29626">Economics 303, Advanced Topics in Microeconomics</a> <p> <li> <a href="http://catalog.vassar.edu/preview_course_nopop.php?catoid=2&coid=2605">Economics 201, Microeconomic Theory </a> <li> <a href="http://catalog.vassar.edu/preview_course_nopop.php?catoid=2&coid=2625">Economics 345, International Trade Theory and Policy</a> <p> In the Fall semester, I will be teaching: <p> <ul> <li> <a href="http://irving.vassar.edu/faculty/gj/345cat.htm">Economics 345, International Trade Theory and Policy</a> <p>        Registered students may <a href="http://moodle.vassar.edu/">Click here for course material.</a> <li> <a href="http://irving.vassar.edu/faculty/gj/345cat.htm">Economics 345, International Trade Theory and Policy</a> <p> </ul> </ul> </ul> <p> In the Spring semester (2012-2013), I will be on leave as Fulbright Senior Scholar visiting the <a href="http://en.ftu.edu.vn/">Foreign Trade University</a> in Hanoi, Vietnam. <p> I will be teaching: <p> <ul> <li>KTE 316: International Economics 2 <p> <li>KTE 401: Microeconomics 2 <p> <li>KTE 408: Industrial Organization <p><b>Working Papers:</b> <ul> <li><a href="#WP49">"On the Geometry of Constant Returns</a> <li><a href="#WP28">"Zakat and Inequality: Some Evidence from Pakistan</a> <li><a href="#WP18">"An Islamic Perspective on Inequality in Pakistan"</a><br> <li><a href="#WP17">"Inequality in Pakistan: a Social Welfare Approach"</a> <li><a href="#WP12">"Do Fringe Benefits Cause Layoffs?"</a> (with M.O. Lieberman) <li><a href="#WP2">"Optimal Implicit Contracts and the Choice between Layoffs and Work Sharing"</a> (with M.O. Lieberman) </ul> <p> <p> <b><u>Vassar Economics Working Paper Abstracts</u></b> <p> For copies of any Vassar Economics Working Paper, contact suconger@vassar.edu<br> <p> <a name="WP2"><b>Number 2</b></a><br> <b>Date</b>: October 1989<br> <b>Title</b>: Optimal Implicit Contracts and the Choice Between Layoffs and Work Sharing<br> <b>Author</b>: Geoffrey A. Jehle and Marc O. Lieberman<br> <b>ABSTRACT</b>:<br> Implicit contract models of labor market equilibrium under work sharing and layoffs are constructed to examine several common explanations for the observed market bias in favor of layoffs. We first establish the optimality of work sharing in the absence of complicating factors. We then show that, contrary to the conventional view, fringe benefits can actually encourage work sharing, and that different hours and employment elasticities of output need not discourage it. Our findings confirm the view that tax distortions in the unemployment insurance system contribute to the bias toward layoffs. However, we show that unemployment benefits for those working reduced hours can help eliminate this bias. <p> <a name="WP12"><b>Number 12</b></a><br> <b>Date</b>: October 1990<br> <b>Title</b>: Do Fringe Benefits Cause Layoffs?<br> <b>Author</b>: Geoffrey A. Jehle and Marc O. Lieberman<br> <b>ABSTRACT</b>:<br> It is commonly believed that firms prefer layoffs to worksharing, in part, because layoffs economize on fringe benefit costs. We find that when labor markets are characterized by optimal implicit contracts, layoffs will never occur in equilibrium, regardless of the level of fringe benefits. <p> <a name="WP17"><b>Number 17</b></a><br> <b>Date</b>: August 1991<br> <b>Title</b>: Inequality in Pakistan: a Social Welfare Approach<br> <b>Author</b>: Geoffrey A. Jehle<br> <b>ABSTRACT</b>:<br> This paper presents new results on income distribution in Pakistan from an analysis of the full HIES data tapes for 1984-85, 1985-86, 1986-87, and 1987-88. An explicit social welfare methodology is adopted to measure changes in inequality at the national level, and within and across provinces, over the period. Estimated Lorenz curves for Pakistan and each of its provinces, in each of the four years, are provided, and cardinally significant Atkinson-Kolm-Sen ethical relative indices of inequality are computed. Strong evidence is found that income distribution in Pakistan improved from 1984-85 to 1987-88, and this conclusion is robust to a wide range of distributional values. Judgements on the trend in inequality over time within and across Pakistan's four provinces are shown to depend more heavily on the investigator's choice of distributional values. <p> <a name="WP18"><b>Number 18</b></a><br> <b>Date</b>: October 1991<br> <b>Title</b>: An Islamic Perspective on Inequality in Pakistan<br> <b>Author</b>: Geoffrey A. Jehle<br> <b>ABSTRACT</b>:<br> This paper examines the distribution of income in Pakistan, and in each of its four provinces, from an explicit and formal Islamic perspective. A cardinally significant Atkinson--Kolm--Sen relative index of inequality reflecting that perspective is proposed and computed from the full HIES data series for the years 1984-85, 1985-86, 1986-87, and 1987-88. There is evidence of a significant decline in overall inequality in Pakistan from 1984-85 to 1987-88, but the level of inequality remains very high. Inter--province and inter--urban/rural differences in inequality profiles within Pakistan and each of its provinces are found to be generally less significant than intra--province and intra--urban/rural differences. <p> <a name="WP28"><b>Number 28</b></a><br> <b>Date</b>: November 1993<br> <b>Title</b>: Zakat and Inequality: Some Evidence from Pakistan<br> <b>Author</b>: Geoffrey A. Jehle<br> <b>ABSTRACT</b>:<br> This paper presents empirical evidence on the extent to which zakat---a form of religiously-mandated charity under Islam---achieves its intended objective in Pakistan. Detailed income and expenditure data from Pakistan's Household Income and Expenditure Survey for 1987-88 are used to construct two income distributions---one containing the distribution of income which would have obtained if relevant forms of charity were not given, and one containing the distribution of income which obtains under a regime in which such charitable giving takes place. Atkinson-Kolm-Sen (AKS) ethical relative indices of income inequality are computed for Pakistan and each of its four provinces, for each of these two income distributions, and are compared over a range of parameter values. Evidence is found that zakat does redistribute from the better off to the worse-off, and so achieves some reduction in measured income inequality in Pakistan. Both intra-province and inter-province components of over-all inequality decline, though the amount of change is generally small. These conclusions are shown to be robust to a wide range of normative values the investigator may select. <p> <a name="WP49"><b>Number 49</b></a><br> <b>Date</b>: August 2000<br> <b>Title</b>: On the Geometry of Constant Returns<br> <b>Author</b>: Geoffrey A. Jehle <br> <b>ABSTRACT</b>:<br> Constant returns to scale, always a simplifying assumption, is often also much more: many important results depend critically on the very special properties of this class of production function. This paper provides a unified set of simple proofs for most of the crucial analytical properties of constant returns production and their implications for firm costs. Only familiar diagrams and high school geometry are used, and the proofs are written to be easily accessible to college sophomores. <p> </ul>