On US politics and IMF Lending

The political factors, which shape IMF lending to LDCs, have attracted much attention. The same goes for the role and influence of the US. However, formal modelling is scant. In this paper, we assume that the US is principal within the IMF and seeks to maximize its impact on the policy stance of debtor countries. We derive the optimal loan allocation mechanism, and test the hypothesis that the probability of an IMF loan is increasing in the amount of political concessions countries make. A political concession is defined as the distance between a country’s bliss point and its actual policy stance measured relative to the US. We propose a bliss-point proxy and test our hypothesis in a sample of 68 countries during the period 1986-94. There is support for our hypothesis in the data. Finally, we show that omitting bliss points may lead to endogeneity bias in empirical work.IMF lending; political factors

Will Two Different Tests for High Fall Risk Both Come to the Same Conclusion?

Includes bibliographical references.For my project, I looked at data from two different tests, both of which determine whether a person is a fall risk. I was trying to find out if both tests would come to the same conclusion. The data that I used contained males and females aged anywhere from 55 years old to 90 years old. I compared the two tests between the males, the females, and then each data set as a whole. I did this by comparing the average scores from the males, the females, and each data set, to see if there were any differences in the results. My end result was that even though both tests look at whether or not a person is a fall risk, the results were different.B.S. (Bachelor of Science

Pseudorapidity Distribution of Charged Particles in PbarP Collisions at root(s)= 630GeV

Using a silicon vertex detector, we measure the charged particle pseudorapidity distribution over the range 1.5 to 5.5 using data collected from PbarP collisions at root s = 630 GeV. With a data sample of 3 million events, we deduce a result with an overall normalization uncertainty of 5%, and typical bin to bin errors of a few percent. We compare our result to the measurement of UA5, and the distribution generated by the Lund Monte Carlo with default settings. This is only the second measurement at this level of precision, and only the second measurement for pseudorapidity greater than 3.Comment: 9 pages, 5 figures, LaTeX format. For ps file see http://hep1.physics.wayne.edu/harr/harr.html Submitted to Physics Letters

Compact sheaves on a locally compact space

We describe the compact objects in the $\infty$-category of $\mathcal C$-valued sheaves $\text{Shv} (X,\mathcal C)$ on a hypercomplete locally compact Hausdorff space $X$, for $\mathcal C$ a compactly generated stable $\infty$-category. When $X$ is a non-compact connected manifold and $\mathcal C$ is the unbounded derived category of a ring, our result recovers a result of Neeman. Furthermore, for $X$ as above and $\mathcal C$ a nontrivial compactly generated stable $\infty$-category, we show that $\text{Shv} (X,\mathcal C)$ is compactly generated if and only if $X$ is totally disconnected.Comment: corrects Lemma 3.

Twisted homology stability of O_n for valuation rings

In this article, we extend an argument of Vogtmann in order to show homology stability of the Euclidean orthogonal group $O_n(A)$ when $A$ is a valuation ring subject to arithmetic conditions on either its residue or its quotient field. In particular, it is shown that if $A$ is a henselian valuation ring, then the groups $O_n(A)$ exhibit homology stability if the residue field of $A$ has finite Pythagoras number. Our results include those of Vogtmann, and hold with various twisted coefficients. Using these results, we give analogues for fields $F\neq\mathbb R$ of some computations that appear in the study of scissor congruences.Comment: minor revisio