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Productivity model
About: Productivity model is a research topic. Over the lifetime, 1410 publications have been published within this topic receiving 44145 citations.
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3,500 citations
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TL;DR: A directional distance function is introduced and used as a component in a new productivity index that readily models joint production of goods and bads, credits firms for reductions in bads and increases in goods, and does not require shadow prices of bad outputs.
Abstract: Undesirable outputs are often produced together with desirable outputs. This joint production of good and bad outputs brings about a difficulty for productivity measurement. Here we introduce a directional distance function and use it as a component in a new productivity index. This index, as an empirical example shows, seems to solve the problem caused by the joint production of good and bad outputs.
1,522 citations
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TL;DR: In this paper, the authors use an equilibrium model to suggest an estimation algorithm that takes into account the relationship between productivity on the one hand and both input demand and survival on the other.
Abstract: Technological change and deregulation have caused a major restructuring of the telecommunications equipment industry over the last two decades. We estimate the parameters of a production function for the equipment industry and then use those estimates to analyze the evolution of plant level productivity over this period. The restructuring involved significant entry and exit and large changes in the sizes of incumbents. Since firms' choices on whether to liquidate and on the quantities of inputs demanded should they continue depend on their productivity, we use an equilibrium model to suggest an estimation algorithm that takes into account the relationship between productivity on the one hand. and both input demand and survival on the other. A fully parametric version of the estimation algorithm would be both computationally burdensome and require a host of auxiliary assumptions. So we develop a semi parametric technique which is both consistent with a quite general version of the theoretical framework and easy to use. The algorithm produces markedly different estimates of both production function parameters and of productivity movements than traditional estimation procedures. We find an increase in the rate of industry productivity growth after deregulation. This in spite of the fact there was no increase in the average of the plants' rates of productivity growth, and there was actually a fall in our index of the efficiency of the allocation of variable factors conditional on the existing distribution of fixed factors. Deregulation was, however, followed by a reallocation of capital towards more productive establishments (by a down sizing, often shutdown. of unproductive plants and by disproportionate growth of productive establishments) which more than offset the other factors' negative impacts on aggregate productivity.
1,168 citations
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TL;DR: In this paper, a service productivity model is developed, which is a function of how effectively input resources into the service (production) process are transformed to outputs in the form of services (internal efficiency), how well the quality of the service process and its outcome is perceived (external efficiency or effectiveness), and how effectively the capacity of service process is utilized.
616 citations
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TL;DR: In this paper, an alternative environmentally sensitive productivity growth index, which is circular and free from the infeasibility problem, is proposed. But it can also be decomposed into sources of productivity growth, and the suggested index is employed in analyzing 26 OECD countries for the period 1990-2003.
Abstract: This paper introduces an alternative environmentally sensitive productivity growth index, which is circular and free from the infeasibility problem. In doing so, we integrated the concept of the global production possibility set and the directional distance function. Like the conventional Malmquist-Luenberger productivity index, it can also be decomposed into sources of productivity growth. The suggested index is employed in analyzing 26 OECD countries for the period 1990–2003. We also employed the conventional Malmquist-Luenberger productivity index, the global Malmquist productivity index and the conventional Malmquist productivity index for comparative purposes in this empirical investigation.
591 citations