Research on substitution in measurement in teaching and research performance;

Open Market Operation:An Analysis of Substitution between Government Bond and Central Bank Bills;

The paper discusses static multidimensional Cournot-Bertrand game model with complete information for two kinds of products with certain substitution between two firms by means of analyzing characters of competition in product market.

Meanwhile, a twodimensional static game model in duopoly and its twodimensional Nash equilibrium on price strategy are discussed for two kinds of products with a certain substitutive relationship.

This research assesses scientific inquiry abilities of 178 students from grade three in junior high schools by using spot observation and worksheet in order to study the alternation of worksheet with spot observation,namely worksheet s validity for the assessment of scientific inquiry abilities.

Empirical Analysis on the Elasticity of Substitution of Our Country s Tradable Products and Non-tradable Products:Data of 1990-2004;

The new production function has follow properties:the production function has constant returns to scale;the marginal rate of technical substitution and the elasticity of substitution are only related to the ratio of the two elements;the production function satisfies the Euler Theorem.

This article arrives at different models determining the influence of improvement of technology on production rate when considering elasticity of substitution.

The ridge regression approach is used to estimate the parameters of the model, and the elasticity of productivity, substitution elasticity and the bias of technological progress of different inputs are studied.