Causes and effects of multimarket activity from theory to empirical analysis

In this paper some of the results emerged in the empirical literature on diversification are put into perspective against the background of a simple integrative model of multiproduct firms. By letting diversification strategies depend on the simultaneous play of four factors (demand relationships and technological links between goods, collusion within a market and across markets), the latter provides an illustrative framework which is useful to discuss how effectively the issue of ambiguous findings has been tackled in applied works. In some cases scholars have devoted substantial effort in order to build tests which can successfully discriminate among the different views on the causes and effects of diversification, while in other circumstances empirical investigations have been conducted with much less care. Other then criticising some of the methods used in the past, the paper provides a number of suggestions that can help guiding future empirical work on corporate diversification. Copyright © 2004 John Wiley & Sons, Ltd.     

Fiscal shocks and real exchange rate dynamics: Some evidence for Latin America

This paper analyses the effects of fiscal shocks in selected Latin American countries using a two-country model for output, labour input, government spending and relative prices. Dynamic simulation techniques are then applied, in particular to shed light on the possible effects of fiscal imbalances on the real exchange rate. Using quarterly data over the period 1980-2006, we find that in a majority of cases fiscal shocks are the main driving force of real exchange rate fluctuations.     

The strength of science and technology drivers for SME innovation

This analysis feeds into the academic debate on the most proficient innovation mode across firms, placing special emphasis on the characteristic case of small and medium enterprises (SMEs). Of the three main approaches considered, the first stresses the importance of innovation based on science and technology (STI) drivers, such as research and development (R&D) and human capital, whereas the second approach emphasises innovation based on learning by doing, by using and by interacting (DUI); the third, more recent approach is conceived as a combination of the former two (STI?+?DUI). In this paper, the three models are tested on a sample of 409 SMEs that have been supported by a public programme for innovation promotion developed by the Basque Government in Spain. The result is quite different from what is expected, yet it is insightful and potentially useful for both academics and policy-makers. Contrarily to what one would expect, SME innovation output is in fact more sensitive to STI drivers than to DUI drivers.     

Monitoring Intensity and Stakeholders’ Orientation: How Does Governance Affect Social and Environmental Disclosure?

The aim of the paper is to investigate the effects of the corporate governance model on social and environmental disclosure (SED). We analyze the disclosures of the 100 U.S. Best Corporate Citizens in the period 2005–2007, and we posit a series of simultaneous relationships between different attributes of the governance system and a multidimensional construct of corporate social performance (CSP). We consider both the extent and the quality of SED, with the purpose of identifying increasing levels of corporate commitment to stakeholders and shedding some light on whether SED is used as a signal or rather as a legitimacy tool. Our empirical evidence shows that the stakeholders’ orientation of corporate governance is positively associated with CSP and SED. On the other hand, we do not find support for the monitoring intensity of corporate governance being negatively associated with social performance. We also find that CSP in the “product” dimension is positively associated with the extent and quality of SED whilst CSP in the “people” dimension is negatively associated with the extent and quality of SED. At a time when shareholders and stakeholders share more common aspects in their relationships with firms, this is a significant area to explore and this research fills an important lacuna in this respect.     

Services trade and credit frictions: Evidence with matched bank–firm data

The effects of credit supply shocks on the exports of services are not clear a priori. On the one hand, services need lower initial investment in physical capital than manufacturing. On the other hand, competitiveness for exporting services requires investments in intangible capital and in product customisation that may be subject to credit frictions. Using Italian matched bank–firm data and focusing on the sovereign debt crisis, we find an elasticity of services exports to credit supply, between 0.3 and 0.4. The effects of credit shocks are especially relevant for firms exporting complex services to countries with weaker institutions and for services that are not the main product of the firms. Overall, our results suggest that credit supply plays a relevant role for exporting services during crises.     

You get what you give: theory and evidence of reciprocity in the sharing economy

We develop an analytical framework of peer interaction in the sharing economy that incorporates reciprocity, the tendency to increase (decrease) effort in response to others’ increased (decreased) effort. In our model, buyers (sellers) can induce sellers (buyers) to exert more effort by behaving well themselves. We demonstrate that this joint increased effort can improve the utility of both parties and influence the market equilibrium. We also show that bilateral reputation systems, which allow both buyers and sellers to review each other, are more responsive to reciprocity than unilateral reputation systems. By rewarding reciprocal behavior, bilateral reputation systems generate trust among strangers and informally regulate their behavior. We test the predictions of our model using data from Airbnb, a popular peer-to-peer accommodation platform. We show that Airbnb hosts that are more reciprocal receive higher ratings and that higher rated hosts can increase their prices. Therefore, reciprocity affects equilibrium prices on Airbnb through its impact on ratings, as predicted by our analytical framework.     

Market Structures with Multi-product Firms: Welfare Analysis and Policy Implications

In the real world firms operate in more than one market and consequently can exploit scope economies and/or demand complementarities. Introducing multi-product firms in the picture makes the standard assumption that more competition is always beneficial for social welfare less clear-cut. In this paper we show that a concentrated structure can be socially preferable in the presence of scope economies, whereas a fragmented structure has to be preferred when products are close substitutes. We also identify either analytically or numerically the socially optimal market structure when aggregate output (and then consumer surplus) or total welfare are used as ranking criteria. The analysis is useful for discussing which market structure should be favored by policy makers aimed at introducing competition in sectors which were previously monopolized by state-owned firms. To that respect, our findings point out that not only the level (number of firms) but also the form (type of firms) of competition matters.     

Age and firm growth: evidence from three European countries

This article provides new insights into the dependence of firm growth on age along the entire distribution of growth rates, and conditional on survival. Using data from the European firms in a global economy survey, and adopting a quantile regression approach, we uncover evidence for a sample of French, Italian and Spanish manufacturing firms with more than ten employees in the period from 2001 to 2008. We find that: (1) young firms grow faster than old firms, especially in the highest growth quantiles; (2) young firms face the same probability of declining as their older counterparts; (3) results are robust to the inclusion of other firms’ characteristics such as labor productivity, capital intensity and the financial structure; (4) high growth is associated with younger chief executive officers and other attributes that capture the attitude of the firm toward growth and change. The effect of age on firm growth is rather similar across countries.     

Gastric liposarcoma: CT appearance

Two cases of liposarcoma of the stomach are described. At computed tomography (CT) the neoplasms showed features of an aggressive malignant tumor, with no fatty values within. We discuss the differential diagnosis of such lesions and conclude that, although rare, liposarcoma should be considered as a possible diagnosis when a large exophytic gastric mass is detected at CT.