Existence and Uniqueness of Equilibrium in Distorted Dynamic Economies with Capital and Labor

In this paper, we provide a set of sufficient conditions under which recursive competitive equilibrium exists and is unique for a large class of distorted dynamic equilibrium models with capital and elastic labor supply. We develop a lattice based approach to the problem. The class of economies for which we are able to obtain our existence and uniqueness result is considerably larger than those considered in previous work. We conclude by applying the new results to some important examples of monetary economies often used in applied work. Journal of Economic Literature Classification Numbers: C62, D51, D90, E10.     

Operators are not Parameters, the Dimensions of Operators and Variables Must be Invariant, and Indices may not be Dimensioned: Rejoinder to Professors Folsom and Gonzalez

What is certain is that mathematics cannot possibly be a valid means (to advances in economic understanding) unless and until it is used properly. That means that dimensions must be used consistently and correctly. Barnett (Barnett, Quart J Austrian Econ, pp. 27–46, 2003) is about problems with the use of mathematics in economics involving the failure to use dimensions/units consistently and correctly. Professor Emeritus Folsom and Professor Gonzalez (Folsom and Gonzalez, Quart J Austrian Econ, pp. 45–65, 2005), hereinafter F&G, say, essentially, that what is correct therein is not new and that what is new is not correct. Additionally, they imply, by raising them, that I did not address issues that I should have, e.g., how to introduce dimensions into introductory economics and problems with the Cobb-Douglas (CD) function unrelated to dimensions. Herein, because of space limitations, I respond only to some of their criticisms. Responses to others are posted on the Ludwig von Mises Institute Working Papers site.

Demand-side Spillovers and Semi-collusion in the Mobile Communications Market

We analyze roaming policy in the market for mobile telecommunications. Firms undertake quality improving investments in network infrastructure in order to increase geographical coverage, capacity in a given area, or functionality. Prior to investments, roaming policy is determined. We show that under collusion at the investment stage, firms and a benevolent welfare maximizing regulators interests coincide, and no regulatory intervention is needed. When investments are undertaken non-cooperatively, firms and the regulators interests do not coincide. Contrary to what seems to be the regulators concern, firms would decide on a higher roaming quality than the regulator. The effects of allowing a virtual operator to enter are also examined. Furthermore, we discuss some implications for competition policy with regard to network infrastructure investment.     

关于移动通信价值网的探讨

技术进步和消费者需求的转变,需要企业组织形态发生根本性的变化以适应新的市场环境。研究移动通信网络运营商在当前新的市场环境下,需要围绕自身的核心能力,建立价值网的组织形态,以价值网的竞争优势迎接新的挑战。     

移动运营商多代际网络演进策略

目前移动通信网络"2、3、4、5"代同时运营。移动运营商们面临着收入放缓、投资支出快速增长和现金流压力等一系列问题,必须对低代际网络进行清频退网。但退网面临着诸多阻碍,包括用户权益、物联网服务迁移和频谱分配。根据全球退网经验,总结得出低代际网络退网的基本条件,避免退网引起震荡,同时移动运营商也需要制定出合理的退网步骤,使低代际网络平滑退网。     

农地“三权分置”对村集体经济发展的影响研究——基于农业农村部固定观察点的实证检验

研究目的：探究农地“三权分置”改革对集体经济发展的影响。研究方法：基于农业农村部固定观察点数据，采用双重差分方法，实证检验农地“三权分置”改革对农村集体经济收入的影响及其机制。研究结果：（1）农地“三权分置”增加了农村集体经济收入，且主要推动了财产性集体经营收入增加，非财产性集体经营收入无明显变化。（2）机制分析表明，农地“三权分置”增强了村集体主体地位。一方面，村集体通过增加地力投资，获得新增土地的增值收益和集中统一流转的管理费；另一方面，农地“三权分置”改革后，村庄能够吸引农业新型经营主体，进而增加农村集体经济收入。（3）异质性分析表明，“三权分置”对农村集体经济收入的提升作用对处于城郊的村庄、村干部受教育年限高的村庄和产业化水平较高的村庄更为明显。研究结论：应当继续深化农地“三权分置”改革，强化农村土地集体所有权落实，增强集体经济活力；同时，鼓励农业新型经营主体发展，完善农村集体经济组织、新型经营主体与农户利益联结机制，促进农村共同富裕。     

独家交易对平台内经营者销量的影响研究——来自互联网外卖平台的实证证据

互联网平台独家交易行为越来越受到反垄断部门的重视，而其经济效应较为复杂，在业界尤其是学界尚存争议。本文首先基于Hotelling模型分析独家交易前后用户的归属变化，并考虑平台赋能和品牌异质性对独家后商家销量的影响，分解其作用机制。再基于2019年西部某重要城市互联网外卖平台的数据进行实证检验和分析，使用倾向得分匹配—双重差分法评估了外卖平台G独家交易对平台内经营者销量影响的净效应。结果表明，独家交易通过渠道效应降低了商家的总销量，而没有出现显著的能提高商家销量的用户转移效应。因此，平台并未在销量提升上有效赋能独家交易的商家。异质性分析发现，品牌商家独家后销量受到的负面影响高于非品牌商家。本文可以为反垄断相关执法提供参考和支持。