Texas is the only US state that limits home equity borrowing to 80 percent of home value. This paper exploits this policy discontinuity around the Texas’ interstate borders and uses a multidimensional regression discontinuity design framework to find that limits on home equity borrowing in Texas lowered the likelihood of mortgage default by about 1 percentage point for all mortgages and 2-4 per...

Many environmental problems involve diffusion and convection processes, which can be described by partial differential equations (PDEs). This paper will describe the development of a MATLAB template that generates a numerical solution to PDEs using the method of lines. The template will be applied to various unsaturated flow problems within soil physics to demonstrate the versatility of the met...

The quality of transmitted speech is based on the auditory characteristics the degraded signal provokes. In past studies, it has been shown that the main features of speech transmission can be subsumed under the orthogonal perceptual dimensions “discontinuity”, “noisiness”, and “coloration”. In order to gain more insight into the dimensional composition for arbitrary transmission conditions, an...

In this article we provide an algebraic characterization of the subgroups of PSL(3,C) for which the maximum number of complex lines in general position contained in its limit set, according to Kulkarni, is equal to four. Also, we give an explicit description of the discontinuity region, according to Kulkarni, of such groups.

GRK — the Grammar Recovery Kit — illustrates options for automation and corresponding tool support in the context of developing quality language references that readily cater for the derivation of parsers. GRK provides the proof-of-concept for two notions: (i) semi-automatic grammar recovery; (ii) language-reference re-engineering. GRK’s support for semi-automatic grammar recovery means that GR...

We present a technique for automatically generating features for data-driven program analyses. Recently data-driven approaches for building a program analysis have been proposed, which mine existing codebases and automatically learn heuristics for finding a cost-effective abstraction for a given analysis task. Such approaches reduce the burden of the analysis designers, but they do not remove i...

In this paper we investigate the relationship between market structure and the composition of R&D activities. We present an empirical model to demonstrate that when market structure is shuffled by an institutional discontinuity, such as liberalisation, basic and applied activities respond in opposite ways: the former decrease whereas the latter increase. As a consequence, market turmoil is like...

We propose a computationai modei for interpreting iine drawings as three-dimensionai surfaces, based on constraints on iocai surface orientation aiong extremai and discontinuity boundaries. Specific techniques are described for two key processes: recovering the threedimensionai conformation of a space curve (e.g., a surface boundary) from its two-dimensionai projection in an image, and interpoi...