Disentangling the effects of process and product innovation on cost and demand

ABSTRACT

We explore in this note different structural models of the impact of process and product innovation on firms' demand and production cost functions. We find that the introduction of process and product innovations affects them differently as could be expected. Both product and process innovation shift forward the demand for the products of the firm. Process innovation reduces production marginal cost, but not always. A possibility, that we cannot prove or reject with the current specification of our models and available data, is that process innovation associated with product innovation raise marginal cost. Interestingly, we also find that advertising significantly augments demand but does not affect production marginal cost. To obtain broader conclusions, richer data will be needed allowing an enlargement of the model, in which process and product innovations could be specified distinctively and well identified.     

On the Persistence of Labour Market Insecurity and Slow Growth in the US: Reckoning with the Waltonist Growth Regime

In this article I systematically incorporate empirical work on rising income inequality and wage stagnation into a regulation theoretic framework for analysing macroeconomic growth. The rise of job polarisation and income inequality coincides with a long period of macroeconomic stagnation, both continuing through to the present (with the exception of a brief period of strong growth and declining inequality in the second half of the 1990s). The corporate scramble to restore profit rates after the crisis of Fordism has transformed the institutional configuration of the political economy. In particular, institutions supporting upward mobility and middle-class incomes in the economy have been eroded by the twin forces of internationalisation (leading to the re-emergence of wage-based competition) and employment externalisation (outsourcing, downsizing, antiunionism, etc). The current growth regime, which may be characterised as Waltonist, based on the Wal-Mart model of buyer-driven global supply chains focused on cutthroat wage-based competition and deunionisation, is not transitional but rather embedded in apparently long-term institutional settlements that amount to a dysfunctional regime.     

Firm Size and National Profiles of IFRS Policy Choice

Previous research on the International Financial Reporting Standards (IFRS) policy choices of large listed companies found a very strong association between policy choice and country. Nationally based pre‐IFRS practices largely explain IFRS policy choices. Nevertheless, some of the policy choices appear to be influenced from abroad, perhaps chosen in order to increase comparability. It has been suggested that smaller companies might be less influenced from abroad, and therefore might display even clearer national profiles of IFRS practice. This paper examines the accounting policy choices made within IFRS financial statements by small listed companies in five major countries. We find highly significant differences between the policies of small and large companies. We also find that small companies make more homogeneous choices, within a country, than large companies do. As a result, the previously published national profiles of the IFRS practices of large companies are misleading in the context of smaller ones.     

Pricing and static hedging of European-style double barrier options under the jump to default extended CEV model

This paper develops two novel methodologies for pricing and hedging European-style barrier option contracts under the jump to default extended constant elasticity of variance (JDCEV) model, namely: a stopping time approach based on the first passage time densities of the underlying asset price process through the barrier levels; and a static hedging portfolio approach in which the barrier option is replicated by a portfolio of plain-vanilla and binary options. In doing so, both valuation methodologies are extended to a more general set-up accommodating endogenous bankruptcy, time-dependent barriers and the commonly observed stylized facts of a positive link between default and equity volatility and of a negative link between volatility and stock price. The two proposed numerical methods are shown to be accurate, easy to implement and efficient under both the JDCEV model and the nested constant elasticity of variance model.     

Size and scope of the underground economy in Germany

The objective of this paper is to improve estimations of the size and scope of the underground economy by introducing a new approach that combines the advantages of the two most commonly used approaches, i.e. currency demand and multiple indicators, multiple causes (MIMIC). The new approach is applied to Germany. Among other things, it is shown that the approach yields improved estimation results. Some policy perspectives are discussed in the concluding section.     

The hard shadow of the Greek economy: new estimates of the size of the underground economy and its fiscal impact

This article presents new estimates of the Greek underground economy and explores the link between the underground economy and aggregate debt. We show that the Greek underground economy has been underestimated heavily and has been on a rising trend again since Greece adopted the Euro. We also present evidence that the size of the underground economy is positively related to the debt-to-GDP ratio, implying that fighting the underground economy is also conducive to financial and macroeconomic stability. Our results suggest that for our sample of 11 EMU member countries, the loss of the inflation tax as an economic policy instrument had drastic consequences. While the underground economy did not have a statistically significant impact on aggregate debt before the introduction of the Euro, it has pushed up the debt-to-GDP ratio in our sample since.     

Agglomeration and labour productivity in Spain over the long term

This paper analyses the relationship between spatial density of economic activity and interregional differences in the productivity of industrial labour in Spain during the period 1860–1999. In the spirit of Ciccone and Hall (Am Econ Rev 86:54–70, 1996) and Ciccone (Eur Econ Rev 46:213–227, 2002), we analyse the evolution of this relationship over the long term in Spain. Using data on the period 1860–1999 we show the existence of an agglomeration effect linking the density of economic activity with labour productivity in the industry. This effect was present since the beginning of the industrialisation process in the middle of the nineteenth century but has been decreasing over time. Our results show that doubling employment density raises average labour productivity in the industrial sector by between 3 and 5% in all periods analysed, with the exception of the last segment from the twentieth century. Hence, we find significant evidence of agglomeration effects. However, these effects seem to have been falling sharply from the mid-nineteenth century until late in the twentieth century, and there appears to be no positive evidence of agglomeration effects in industry in the period 1985–1999. This result could be explained by an important increase in the congestion effects in large industrial metropolitan areas that would have compensated the centripetal or agglomeration forces at work. Furthermore, this result is also consistent with the evidence of a dispersion of industrial activity in Spain during the last decades.

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重庆市促进就业的政策与法制建设

虽然“劳动者自主择业,市场调节就业,政府促进就业”的方针业已成为社会的共识,并已经上升为国家的法律规定;但是对于“促进就业”问题的法制研究明显不足,尤其是应当从宏观上和微观上采取什么样的政策措施和法制方略,目前还缺少一种关注。这里,结合重庆市的实际状况对重庆市促进就业的政策和法制建设提出一些想法和建议。     

Posting,quoting, and replying: a comparison of methodological approaches to measure communication ties in web forums

Active involvement in discussion-based communities is nowadays a firm part of people’s online activities. The measurement of communication ties and networks between contributors to such domains is thus becoming a relevant research question in social sciences. However, especially in web forums, very often almost no direct relational information exists that would indicate the presence of communication ties among contributors. In contrast with the reply-to structure of Usenet newsgroup or mailing list conversations that contain explicit relational information created by the contributors, some web forums only enable participants to add new posts to threads or to quote preceding posts in threads. When discussions emerge, it is difficult to identify who is replying to whom. Drawing on the social network studies dealing with the conversational patterns in Usenet and web forums, this paper presents an alternative approach to identifying the ties between authors of posts. Several assumptions are discussed, and different measures are developed and empirically evaluated. The findings provide a starting point for the development of a standardized methodology for studying social networks in online communities where only limited direct information about communication ties is available.     

生物技术产业集群的动力机制及其演进——基于国外典型集群的多案例研究

在产业集群理论的总体框架下,本文以国外五个典型集群为研究对象,归纳了生物技术产业集群演化的关键动力要素,即科学研究、风险投资、传统大企业介入、政府支持、中介机构、市场需求、创新文化、相关产业支撑、龙头企业以及"龙头企业-专家型公司-科研机构"之间的良性互动。在此基础上,研究了要素的演进和集群发展的内在规律。最后,结合我国的实际情况,基于政府的视角得出若干促进我国生物园区发展的启示。