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In a competitive environment most of the business firms face an irritatingly limited supply of resources. This has led to a significant emphasis on the efficient utilization of their resources. This present monograph discusses the uses of various variants of data envelopment analysis (DEA) models for evaluating firm efficiency in different industries. In this volume, we first contrast both frontier translog production function and DEA for estimating returns to scale and efficiencies by applying them to data on Indian Steel industry. Second, we use DEA to estimate the technical efficiency...