Adjustable rate mortgages and the mortgage crisis
Purpose – The purpose of this paper is to closely examine adjustable rate mortgages (ARM) made in Northwest Louisiana in order to provide a greater understanding of the causes of the high rate of defaults and potential foreclosures currently being experienced in Louisiana.Design/methodology/approach – The paper examines detailed information for all ARM recorded in a three‐month‐period.Findings – The paper finds that at least half of the loans have highly unfavorable terms with about a third having initial rates that are at least 3 percent higher than prime mortgage rates; these initial rates are likely to increase dramatically during future adjustment periods. Many borrowers also face high interest penalties if they pay back their loans before the first adjustment period. Also notable is the fact that only 7 percent result in foreclosure. While many borrowers receive unfavorable loans, relatively few loans are held for more than six years; a probable explanation is that the borrowers realize they have agr...
Localization of Lesions in Dermoscopy Images Using Ensembles of Thresholding Methods
Dermoscopy is one of the major imaging modalities used in the diagnosis of melanoma and other pigmented skin lesions. Due to the difficulty and subjectivity of human interpretation, automated analysis of dermoscopy images has become an important research area. Border detection is often the first step in this analysis. In this article, we present an approximate lesion localization method that serves as a preprocessing step for detecting borders in dermoscopy images. In this method, first the black frame around the image is removed using an iterative algorithm. The approximate location of the lesion is then determined using an ensemble of thresholding algorithms. Experiments on a large set of images demonstrate that the presented method achieves both fast and accurate localization of lesions in dermoscopy images.
Explicit tests of contingent claims models of mortgage default
This paper provides explicit and powerful tests of contingent claims approaches to modeling mortgage default. We investigate a model of “frictionless” default (i.e., one in which transactions costs, reputation costs, and moving costs play no role) and analyze its implications-the relationship between equity and default, the timing of default, its dependence upon initial conditions, and the severity of losses. Absent transactions costs and other market imperfections, economic theory makes well-defined predictions about these various outcomes.The empirical analysis is based upon two particularly rich bodies of micro data: one indicating the default and loss experience of all mortgages purchased by the Federal Home Mortgage Corporation (Freddie Mac), and a large sample of all repeat sales of single family houses whose mortgages were purchased by Freddie Mac since 1976.