Rick Ashley

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In 20 normal subjects, sounds or vibrational signals were recorded from the biceps brachii muscle during voluntary isometric contraction. Fourier analysis showed presence of predominantly low frequency components with little contributions beyond 60 or 70 Hz. Relatively high amplitude peaks occurring below 20 Hz were seen in the frequency spectrum with the(More)
& It is the purpose of combined sewerage systems to convey a variety of solids, and associated liquid wastes, for treatment and return to the environment. The movement of the solids in sewers has come under increased scrutiny in recent years, due to the pollution and maintenance concerns associated with this material. The real or perceived physical,(More)
In 15 normal subjects, antidromic median sensory compound nerve action potentials (SCNAPs) were recorded supramaximally from the middle finger with ring electrodes, using different interelectrode recording distances. The onset latencies were identical in all recording instances. The peak latency and amplitude of the major negative deflection continued to(More)
Cortical somatosensory evoked potential (SEP) recording to lower-limb stimulation was performed on a patient to monitor surgery for scoliosis. Intraoperatively, the patient developed acute and irreversible hemorrhagic hypotension. Cortical SEPs were clearly present with systolic blood pressures in the low 50s and upper 40s (mm Hg). The potentials(More)
This paper studies the effects of ad-valorem tariffs on imported cheese quality. Our starting point is a Gorman-Lancaster-style hedonic model of demand for differentiated products. We build on recent identification results for this type of models to nonpara-metrically estimate product quality using a panel of cheese imports. We use the quality estimates(More)
abstract Available methods for testing the statistical significance of an improvement in postsample forecasting from one model over another are briefly reviewed. These methods are based on a pre-selected partitioning of the data into a sample period (to be used for model specification/estimation) and a postsample forecasting period, to be used only for(More)
This paper offers a tractable framework (with wide applicability, geared at the applied user) for exploring the implications of economic interaction. In this framework, agents face binary choices and receive iid shocks; payoffs depend upon one's own actions, shocks, and other agents' actions. Key results: 1), the LLN can readily be postponed (or defeated);(More)