On November 5, 1990, the President signed into law House Resolution 5835, the Omnibus Budget Reconciliation Act (OBRA) of 1990 (Public Law 101-508). Following are summaries of the Medicare and Medicaid provisions.

In recent years, nuts have received special attention because of their potential role in preventing cardiovascular disease. Because nuts are very rich in total fat that can potentially be oxidized and their skins contain several antioxidants, studies have been conducted to evaluate the potential effect of nut consumption on oxidative stress. This review evaluates the in vitro and in vivo studie...

Classical hypothesis testing plays a central role in econometrics, but in many applied problems we face a preliminary stage of the analysis in which we need to make decisions about model specification. These decisions are not very well formalized in terms of classical hypothesis testing, and gradually specialized procedures have been developed for this under the rubric “model selection.” In thi...

1. Abakumov, E.V., 2010. The sources and composition of humus in some soils West Antarctica. European Journal Soil Science 43, 499–508. https://doi.org/10.1134/S10642.... CrossRef Google Scholar

Suppose we consider a commodity like oil, both demand and supply functions are subject to various shocks that shift the two curves around. What we see –at best– is a set of intersections. In the absence of any further information the problem of uncovering separate S and D curves is hopeless. This point was made in the classic (1928) paper of E. J. Working – “What do Statistical Demand Curves Sh...

In this lecture I want to briefly describe some techniques for evaluating dynamic econometric models like the models for gasoline demand you have been estimating. Until now, we have implicitly assumed that these models satisfied the classical assumptions of the Gaussian linear model. In particular, we have assumed that the error sequences {ut} were iid and approximately Gaussian, thus justifyin...

1. Don’t even open this until you are told to do so. 2. Be sure to mark your section number (508, 509 or 510) and your test form (A, B, C or D) on the scantron! 3. Sign your name where indicated on your scantron and write your Tuesday section number and computer number beside it. Also, you must place your scantron in the correct section stack (for next Tuesday). 4. There are 20 multiple-choice ...

OBJECTIVES The saccharide ultrasound contrast agent SHU 508 A was used to test the hypothesis that an intravenous, transpulmonary contrast method can enhance color Doppler flow signals in the left atrium in a clinically useful manner. BACKGROUND Color Doppler display of mitral regurgitation may be unreliable because of variable signal to noise ratios that are at times poor. Traditional contra...