OBJECTIVES To evaluate the efficacy of postoperative radiotherapy for oral cavity squamous cell carcinoma (OCSCC) by comparing outcomes of high-risk subgroups. STUDY DESIGN Retrospective review. METHODS Outcome study of 139 patients with OCSCC treated with gross total resection and postoperative radiotherapy ± chemotherapy and at least one high-risk pathologic finding: positive margin (52%)...

We analyze the performance of retail firms for the period 1978-97 using public financial data. Our performance measures are long-term stock returns and whether the firm filed for bankruptcy in the period of study. We assume that over a long time period of at least five years, stock returns are a reasonable measure of the overall success of a firm. We have found a very wide disparity in performa...

A bioeconomic computer model was used to evaluate alternate calving seasons in a cow-calf enterprise under range conditions representative of the Northern Great Plains. The simulated ranch utilized a rotational breeding system based on Hereford and Angus and had a fixed forage base (4,500 animal unit months of native range, 520 t of grass hay, and 183 t of alfalfa hay). Calving seasons studied ...

Data from a farm survey and choice experiment are used to value the benefits of Bt cotton in Pakistan. Unlike previous research on the economic impacts of Bt, which mostly concentrated on financial benefits in terms of gross margins, we also quantify and monetize positive externalities associated with technology adoption. Due to lower chemical pesticide use on Bt cotton plots, there are signifi...

In order to assess the technical and economic efficiency of conventional farm businesses a variety of management techniques have been developed. These include gross and net margin analysis and full cost accounting. This paper reviews their effectiveness in organic farming systems and finds that all of the techniques can be useful in helping to assess the economic efficiency of individual enterp...

We describe the case of a 14-year-old boy who presented with a large, 17.6-cm retroperitoneal mass, along with multiple metastases, and was diagnosed with desmoplastic small round cell tumor. After initial chemotherapy, he underwent gross total resection with a positive margin. On postoperative radiation planning computed tomography, a 6.8-cm heterogeneous mass was noted in the surgical bed. Gi...

The construction industry is one of the largest sectors in the U.S. economy, yet little is known about the key macroeconomic parameters that affect its industry’s structure and performance. The main objectives of this research are 1) to analyze the macroeconomic performance of construction industry as a whole and at fourteen of its sub-sectors in terms of labor productivity, gross margin, and w...