The impact of compatibility on innovation in markets with network effects

ABSTRACT

This article analyses the relationship between compatibility and innovation in markets with network effects using a model of competition with endogenous R&D, commercialization and compatibility. Compatibility is a mutual decision between firms and demand is partially dependent on overall consumption across compatible networks. Incumbent acquisition of an innovation or profit from entry provides entrepreneurs with an incentive for developing technological improvements and entrepreneurs receive greater returns if larger incumbents offer compatibility with their installed base. But for sufficiently weak network effects a large incumbent increases demand for its own product by denying compatibility to rivals. As a result, a credible threat of incompatibility reduces the entrepreneur's reserve to sell an innovation, but can also increase offers from smaller incumbents to acquire the innovation if it also avoids an incompatibility response from a larger incumbent. In response, entrepreneurs adjust their research effort in order to target a favourable compatibility regime that maximizes profit from entry or offers to acquire the innovation from incumbents. This leads to a complex relationship between the strength of network effects, innovation incentives, the entrepreneur's ambition for improvement and potentially disrupting the compatibility regime.     

Investment-specific technological change, skill accumulation, and wage inequality

Wage inequality between education groups in the United States has increased substantially since the early 1980s. The relative number of college-educated workers has also increased dramatically in the postwar period. This paper presents a unified framework where the dynamics of both skill accumulation and wage inequality arise as an equilibrium outcome driven by measured investment-specific technological change. Working through equipment–skill complementarity and endogenous skill accumulation, the model does well in capturing the steady growth in the relative quantity of skilled labor during the postwar period and the substantial rise in wage inequality after the early 1980s. Based on the calibrated model, we examine the quantitative effects of some hypothetical tax-policy reforms on skill accumulation, wage inequality, and welfare.     

技术进步对能源消费回报效应的估算

"回报效应"是能源经济学中的一个著名命题,但在国内尚缺乏实证检验.本文以改革开放以来中国宏观经济能源消费数据为样本,对这一命题进行了计量检验.结果表明,在中国宏观经济层面上,"回报效应"在30-80%波动,而且20世纪90年代的平均回报率要明显低于20世纪80年代.对此进一步分析后本文认为"回报效应"将呈现三种趋势:"回报效应"越来越低;更多地体现为"硬"技术进步方面;更多地体现在生活部门.     

On using relative prices to measure capital-specific technological progress

Recently, Greenwood, Hercowitz and Krusell (GHK) have identified the relative price of (new) capital with capital-specific technological progress. In a two-sector growth model, however, the relative price of capital equals the ratio of the productivity processes in the two sectors. Restrictions from this model are used with data on wages and prices to construct measures of productivity growth and test the GHK identification, which is easily rejected by the data. This raises questions about various measures of the contribution that capital-specific technological progress might make to the economy. This identification also induces a negative correlation between the resulting measures of capital-specific and economy-wide technological change, which potentially explains why papers employing this identification find that capital-specific technological change accelerated in the mid-1970s. We impose structure on the productivity measures based on their long-run behavior and find evidence of a slowdown in productivity in the 1970s that is common to both sectors and an acceleration in the mid-1990s that is exclusive to the capital sector.     

The sector bias of skill-biased technical change and the rising skill premium in transition economies

We test the hypothesis that the sector bias of skill biased technical change is important in explaining the rising relative wage of skilled workers in the manufacturing sector in three Central and Eastern European transition countries. The econometric results broadly confirm that the concentration of skill biased technical change in the skill intensive sectors had a significant effect on the skill premium in these transition countries.

Capital–skill complementarity and inequality: A sensitivity analysis

Krusell et al. in [Krusell, P., Ohanian, L., Ríos-Rull, J.V., Violante, G.L., 2000. Capital–skill complementarity and inequality: A macroeconomic analysis. Econometrica 68 (5), 1029–1053] analyzed the capital–skill complementarity hypothesis as an explanation for the behavior of the US skill premium. We refit Krusell et al.'s [Krusell, P., Ohanian, L., Ríos-Rull, J.V., Violante, G.L., 2000. Capital–skill complementarity and inequality: A macroeconomic analysis. Econometrica 68 (5), 1029–1053] model with two alternative capital equipment price series: One proposed by Greenwood et al. [Greenwood, J., Hercowitz, Z., Krusell, P., 1997. Long-run implications of investment-specific technological change. Amer. Econ. Rev. 87 (3), 342–362] and the official, revised National Income and Product Accounts (NIPA) data. We find that capital–skill complementarity is preserved, but other results were sensitive to the data used. Specifically, the fit of the model was similar to Krusell et al.'s [Krusell, P., Ohanian, L., Ríos-Rull, J.V., Violante, G.L., 2000. Capital–skill complementarity and inequality: A macroeconomic analysis. Econometrica 68 (5), 1029–1053] using the NIPA data, but not the Greenwood et al. [Greenwood, J., Hercowitz, Z., Krusell, P., 1997. Long-run implications of investment-specific technological change. Amer. Econ. Rev. 87 (3), 342–362] data. Also, both series produce estimates of the elasticity of substitution between unskilled labor and equipment that are substantially larger than Krusell et al.'s [Krusell, P., Ohanian, L., Ríos-Rull, J.V., Violante, G.L., 2000. Capital–skill complementarity and inequality: A macroeconomic analysis. Econometrica 68 (5), 1029–1053] estimates.     

Price competition in a differentiated products duopoly under network effects

We examine price competition under product-specific network effects, in a duopoly where the products are differentiated both horizontally and vertically. We emphasize the role of consumers’ expectations formation. When expectations are not influenced by prices, the market may be shared but shares must be equal unless product qualities differ or one firm, possibly even the low-quality one, may capture the entire market. When expectations are influenced by prices, which would be the case when there is commitment, competition becomes more intense and the high-quality firm tends to capture a larger market share. Under strong network effects there is a continuum of equilibria and the higher the prices, the smaller the difference between those prices can be. Requiring continuity of expectations, however, delivers a unique equilibrium where one firm captures the entire market.     

国外新经济理论的研究进展

随着技术变革的深入,新兴技术对经济发展产生的影响更为深入,产生了以知识和创新为核心的新经济,对传统经济理论提出了挑战。特别是金融危机之后,全球经济发展方式发生变革,对新经济理论与方法的研究具有重要现实意义。文章对国外新经济的产生与发展相关理论进行系统梳理与分析、从技术变革与新经济的关系、新经济的理论基础、新经济形态下经济发展方式的变化及其新经济理论的应用领域等方面剖析了国外新经济理论的研究进展,提出未来新经济领域可围绕国家创新体系的战略定位研究、技术变革发展方向的预测方法、技术变革推动经济增长与社会进步的过程分析、新经济理论框架对产业结构影响以及新经济背景对企业发展的影响等方面展开。     

The network of networks: Localized technological change in telecommunications and productivity growth

Radical innovations in the usage of telecommunication services have drastically changed the role of telecommunications in the economy. Today the usage of telecommunications services is associated with the opportunity to extract significant quasi-rents. An empirical analysis of the Italian case in the mid-eighties confirms the significant difference between telecommunications cost share and marginal productivity levels. The opportunity to reap transient quasi-rents has in turn pushed users to innovate so as to become major players in the arena of technological change in telecommunications and information technologies. In this context the notion of network of networks, implemented in the European Union, seems most appropriate to push the dynamic efficiency of the system and accommodate both centrifugal and centripetal innovations, yet also to retain network interoperability and interconnectivity.     

Temporary contracts, employment protection and skill: A simple model

We construct a theoretical labor market that incorporates skill differences across workers to identify under which conditions temporary contracts are a way to access to permanency. Firing costs and unemployment benefits increase the threshold productivity above which workers access to permanency.     

Free and second-best entry in oligopolies with network effects

We compare the number of firms in equilibrium in a Cournot industry with positive network effects and complete compatibility, under free and second-best entry. Under free entry, the firms decide whether to enter the market or not; in the second-best problem, the number of firms is established by the regulator to maximize social welfare (the regulator controls entry but not production). We show that when individual equilibrium output decreases with entry (business-stealing competition), free entry may lead to more or less firms than the second-best problem. This contrasts with the standard (nonnetwork) Cournot oligopoly model, wherein with business-stealing competition, free entry leads to an excessive number of firms compared with the second-best solution.     

Technological progress and regress in pre-industrial times

This paper offers micro-foundations for the dynamic relationship between technology and population in the pre-industrial world, accounting for both technological progress and the hitherto neglected but common phenomenon of technological regress. A positive feedback between population and the adoption of new techniques that increase the division of labor explains technological progress. A transient shock to productivity or population induces the neglect of some techniques rendered temporarily unprofitable, which are therefore not transmitted to the next generation. Productivity remains constrained by the smaller stock of knowledge and technology has thereby regressed. A slow process of rediscovery is required for the economy to reach its previous level of technological sophistication and population size. The model is employed to analyze specific historical examples of technological regress.

Jared Diamond, Ten Thousand Years of Solitude, 1993.

     

A functional approach for studying technological progress: Extension to energy technology

This paper extends a broad functional category approach for the study of technological capability progress recently developed and applied to information technology to a second key case—that of energy based technologies. The approach is applied to the same three functional operations—storage, transportation and transformation—that were used for information technology by first building a 100 plus year database for each of the three energy-based functional categories. In agreement with the results for information technology in the first paper, the energy technology results indicate that the functional approach offers a stable methodology for assessing longer time technological progress trends. Moreover, similar to what was found with information technology in the first study, the functional capability for energy technology shows continual—if not continuous—improvement that is best quantitatively described as exponential with respect to time. The absence of capability discontinuities—even with large technology displacement—and the lack of clear saturation effects are found with energy as it was with information. However, some key differences between energy and information technology are seen and these include:

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Lower rates of progress for energy technology over the entire period: 19-37% annually for Information Technology and 3-13% for Energy Technology.

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Substantial variability of progress rates is found within given functional categories for energy compared to relatively small variation within any one category for information technology. The strongest variation is found among capability progress among different energy types.

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More challenging data recovery and metric definition for energy as compared to information technology.

These findings are interpreted in terms of fundamental differences between energy and information including the losses and efficiency constraints on energy. We apply Whitney's insight that these fundamental differences lead to naturally modular information technology artifacts. The higher progress rates of information-based as opposed to energy-based technologies follows since decomposable systems can progress more rapidly due to the greater ease of independent as opposed to simultaneous development. In addition, the broad implications of our findings to studies of the relationships between technical and social change are briefly discussed.     

美国科技政策与技术创新模式的协同演进研究

分4个阶段概括了美国自建国以来到奥巴马政府的科技政策历史沿革,指出其"一次转折、两次回归"的特征;总结了技术创新由"线性模式"向"平面模式"的演变,并提出了"技术创新立体网络模式"的概念。通过对两者的融合,简析了其相互影响的协同演进过程,以期能对我国科学技术创新政策的科学化制定和进一步研究有所借鉴。     

技能溢价与工资不平等理论研究进展

尽管技能偏向性技术进步假说为理解技能溢价和工资不平等提供了一个较好的分析框架,但依然存在不一致的研究结果.争议主要集中在资本与技能之间的互补关系、劳动力市场制度变迁以及技术和贸易哪一个是造成收入差距拉大的主要原因等几个方面.未来的研究将会建立一个统一的理论框架,分析各因素在解释工资不均衡程度增加时的相互作用.     

New insights on earnings trends across skill groups and industries in West Germany

This paper provides an empirical analysis of the structure of earnings in West Germany across skill groups and industries. Our analysis is based on data from the German Socioeconomic Panel for the period 1984 to 1994. We estimate quantile regressions, both for the entire sample period and for each year separately, in order to obtain a finer picture of the earnings structure compared to conventional least squares methods. For robust standard error estimation, this study uses a block bootstrap procedure taking account of heteroskedasticity and autocorrelation in the error term. We also suggest a simple procedure to obtain a consistent estimate of inter-industry earnings variability. Our main findings are: first, pooled estimation comprising a uniform time trend is not rejected by the data, and second, the effects of human capital variables and industry dummies on earnings differ considerably across quantiles. First version: May 1998/Final version: April 2002 RID="*" ID="*"  We are grateful to an anonymous referee as well as to Thiess Büttner, Christian Dustmann, Wolfgang Franz, John Haisken-DeNew, Costas Meghir, Werner Smolny, Peter Winker, Volker Zimmermann, and seminar participants in Heidelberg, Kassel, Konstanz, and Paris for helpful comments. However, all errors are our sole responsibility. RID="*" ID="*"  We are grateful to an anonymous referee as well as to Thiess Büttner, Christian Dustmann, Wolfgang Franz, John Haisken-DeNew, Costas Meghir, Werner Smolny, Peter Winker, Volker Zimmermann, and seminar participants in Heidelberg, Kassel, Konstanz, and Paris for helpful comments. However, all errors are our sole responsibility.     

The effects of one-way compatibility on technology adoption in systems markets

This paper analyzes the effects of one-way compatibility on technology adoption in a market that is characterized by a free-entry condition on the software side. We show that hardware-backward compatibility increases a new-generation hardware firm’s profit; the effects of software-backward compatibility on the hardware firm’s profits depend on the distribution of consumer types.     

Radical changes in inter-organizational network structures: The longitudinal gap

The main goal of the research presented in this paper is to provide an overview of the available insights concerning radical changes in inter-organizational network structures. The following research question has been formulated: what is known about the way organizations in networks deal with, and are affected by, radical changes in inter-organizational network structures?In order to answer this question, a review of the most relevant literature dealing with changes in network structure over time is presented. The literature reviewed has been analyzed by comparing the role of change in the analysis (independent vs. dependent variable) as well as the manner in which change is conceptualized (incremental vs. radical change and dyadic vs. network change).It is found that studies that observe networks changing over time are scarce. Nevertheless, the available studies provide some interesting insights concerning the formation, evolution and termination of dyadic ties, network evolution, and the effects of (radical) changes in network structure. However, more research on several specific topics seems necessary. These topics are: the link between dyadic change and change at the network level, the evolution of network structures, the processes through which critical events lead to changes in network structures, and the effects of radical changes in network structures.     

Inertia Risk: Improving Economic Models of Catastrophes*

We model endogenous catastrophic risk in a new way. We call it “inertia risk”, which accounts for delays between physical variables and the hazard rate – a characteristic often observed in reality. The added realism significantly affects optimal policies relative to the standard model of catastrophic risk. The probability of a catastrophe occurring at some point in time can span the entire interval [0,1], and is not 0 or 1 as is typical in standard models. Inertia risk can also generate path dependences. We illustrate the implications for policy in a simple model of climate change.     

海外网络嵌入与国际化速度对技术创新的影响

结合国际化与创新管理理论,构建了海外网络嵌入对技术创新的影响机制模型。基于长三角地区314家外向型制造企业问卷数据的实证结果发现,相较于利用式技术创新,海外网络嵌入对探索式技术创新的影响更显著;初始国际化速度强化了海外网络嵌入与技术创新的关系,后续国际化速度在海外网络嵌入与技术创新关系中具有差异化调节作用。该研究揭示了海外网络嵌入与技术创新的内在作用机理,对于企业主动嵌入海外网络和促进技术创新具有启示意义。