MARKET STRUCTURE,OPPONENT BEHAVIOR,AND INFORMATION IN A MARKET GAME

An experimental duopoly game was used to test the effects of market structure, opponent behavior, and information about opponent behavior in the game. Rational behavior would be responsive only to market structure. Problem-solving behavior would be responsive to all three factors. Results showed that decision behavior was responsive to all three factors in interaction as well as reponsive to interactive effects of time.     

碳约束下江苏省节能减排效率时空演化及分异研究

节能减排是发展低碳经济，建设生态文明的必由之路。运用ＤＥＡ 的ＧＭＬ 指数法和Ａ?ＥＢＭ法相结合的创新模式测算有碳约束下２００６—２０１４ 年江苏省地级市节能减排效率。结果表明：江苏省节能减排效率均值为０?? ８２９，９ 年间整体上升２?? ０％，其中Ａ?ＥＢＭ 效率呈“Ｗ”型变化，ＧＭＬ 指数的变化呈现波动向上的“Ｍ”型；空间区域分布特点为苏南地区领先、苏中次之、苏北地区相对落后。     

Industrial productivity dilemma in management and economics: Retrospect and prospect

Industrial productivity dilemma refers to a situation in which modifying and refining existing technologies helps maximize an industry's productivity but constrains productivity from leaping forward. As substantial research exists on this topic in both management and economics, we seek to clarify the concept and its utility. We synthesize relevant studies in various disciplines by reviewing 731 pieces of literature. We summarize various mechanisms that explain why, as the industry develops, the proportion of disruptive innovation declines and the ratio of productivity research and development increases. Our results suggest that industrial productivity dilemma occurs because under a given technological paradigm, there are economic and natural limits to technological development. Only through disruptive innovation can industries improve their long-term adaptability to the environment and promote industrial upgrading or forming new industries. Although with modern technology developments, industrial productivity dilemma may be resolved, because some giant firms can balance the exploration–exploitation conflict well; moreover, structural problems occur as productivity is unbalanced among firms. The productivity dilemma (and its by-product, the structural problem) will always exist. We develop a conceptual framework based on the environment, industry, firm, and policy dimensions to guide future research.     

水下气体射流的诱导水流场结构PIV测量

在矩形水箱内,对水下气体射流环境流场进行了PIV实验研究.聚苯乙烯荧光粒子作为PIV示踪粒子,发射波长为580 nm,经过滤消除了532 nm激光在水中的各类反射.成功捕捉到了气体射流环境场中明显的涡流对,从产生、发展、减弱到消失的完整过程.涡流是射流所诱导的环境流动的基本结构,在射流的法向平面内涡流对是射流作用的主要形式.气体射流对环境流场的作用主要限制在射流段,其作用沿射流轴线快速衰减.     

Subsampling Intervals in Autoregressive Models with Linear Time Trend

A new method is proposed for constructing confidence intervals in autoregressive models with linear time trend. Interest focuses on the sum of the autoregressive coefficients because this parameter provides a useful scalar measure of the long‐run persistence properties of an economic time series. Since the type of the limiting distribution of the corresponding OLS estimator, as well as the rate of its convergence, depend in a discontinuous fashion upon whether the true parameter is less than one or equal to one (that is, trend‐stationary case or unit root case), the construction of confidence intervals is notoriously difficult. The crux of our method is to recompute the OLS estimator on smaller blocks of the observed data, according to the general subsampling idea of Politis and Romano (1994a), although some extensions of the standard theory are needed. The method is more general than previous approaches in that it works for arbitrary parameter values, but also because it allows the innovations to be a martingale difference sequence rather than i.i.d. Some simulation studies examine the finite sample performance.