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美国石油炼制业的经济—线性规划模型AI 解读

The linking of statistically estimated relationships with an engineering linear programming model offers important potentials for simulation and forecasting models of industries. This article describes such a model of the U.S. petroleum refining industry. Econometric techniques are used to specify product demands, prices, and some technical adjustments. A linear programming specification of the production function, assuming cost minimization, determines crude oil input…

美国石油炼制行业的经济—线性规划模型AI 解读

The linking of statistically estimated relationships with an engineering linear programming model offers important potentials for simulation and forecasting models of industries. This article describes such a model of the U.S. petroleum refining industry. Econometric techniques are used to specify product demands, prices, and some technical adjustments. A linear programming specification of the production function, assuming cost minimization, determines crude oil input…

修订后美国国民账户中的统计差额AI 解读

As is well known, the U. S. national accounts contain a “Statistical Discrepancy” which serves to reconcile estimates of GNP from the product and from the income side. While the Discrepancy is a measure only of overall consistency rather than of error, its magnitude and pattern over time do give some indication of the quality of the national accounts data. In the past, the Statistical Discrepancy has not always behaved as a quantitatively unimportant random error term—a…

修订后美国国民账户中的统计差额AI 解读

As is well known, the U. S. national accounts contain a “Statistical Discrepancy” which serves to reconcile estimates of GNP from the product and from the income side. While the Discrepancy is a measure only of overall consistency rather than of error, its magnitude and pattern over time do give some indication of the quality of the national accounts data. In the past, the Statistical Discrepancy has not always behaved as a quantitatively unimportant random error term—a…

消费者态度、股票价格与非态度变量的预测能力AI 解读

This article reports on tests of the comparative usefulness of consumer attitudes, stock prices, and some non-attitudinal variables for short-term forecasting of the value and number of motor vehicle sales. Both levels and changes of the variables are analyzed for a variety of time spans between 1952 and 1962. The work suggests that stock prices and some non-attitudinal variables, like the length of the work week, share the predictive ability of consumer attitudes, except…

消费者态度、股票价格与非态度变量的预测能力AI 解读

This article reports on tests of the comparative usefulness of consumer attitudes, stock prices, and some non-attitudinal variables for short-term forecasting of the value and number of motor vehicle sales. Both levels and changes of the variables are analyzed for a variety of time spans between 1952 and 1962. The work suggests that stock prices and some non-attitudinal variables, like the length of the work week, share the predictive ability of consumer attitudes, except…