EVIDENCE ON GENDER WAGE DISCRIMINATION IN PORTUGAL: PARAMETRIC AND SEMI‐PARAMETRIC APPROACHES

In this paper we consider several alternative approaches to analyze gender wage discrimination. Besides the traditional OLS estimator, we use two other approaches to control for sample selection bias problems: the parametric procedure suggested by Vella and Wooldridge, and the Li and Wooldridge semi‐parametric estimator. We study the case of Portugal, employing data from the European Community Household Panel. The results reveal that the discrimination estimates are sensitive to the different econometric approaches. In fact, when sample selection bias is taken into account, the discrimination values are reduced and are typically not significant.     

Clustering financial time series with variance ratio statistics

This study introduces a new distance measure for clustering financial time series based on variance ratio test statistics. The proposed metric attempts to assess the level of interdependence of time series from the point of view of return predictability. Simulation results show that this metric aggregates time series according to their serial dependence structure better than a metric based on the sample autocorrelations. An empirical application of this approach to international stock market returns is presented. The results suggest that this metric discriminates stock markets reasonably well according to size and the level of development. Furthermore, despite the substantial evolution of individual variance ratio statistics, the clustering pattern remains fairly stable across different time periods.     

The business-to-business relationship dimensions in financial services markets

This paper discusses the nature of financial business relationships by drawing on the IMP Group’s theory of industrial relationships. It discusses, among other aspects, the interaction process between banks and their corporate clients, the longevity of relationships, the interdependence between both sides, and the atmosphere of financial services relationships. The conclusions are thought to be interesting and useful for the managers of firms and financial services when setting relationship marketing policies and for academic research on business-to-business services relationships. The field research was done in Portugal and the case method was used.

On positional consumption and technological innovation: an agent-based model

Positional behaviour is arguably a source of social externalities. Remedies for this market failure are defended by some authors and rejected by others. One of the issues discussed is the role that the competition for positional goods may have in generating technological innovation. This article aims to contribute to the understanding of the dynamics of this process through the use of an agent-based model. Simulations show a plausible dynamics of the process of technological innovation as generated by consumption of positional nature. An interpretation of the results in the scope of the policy discussion in question is provided. The influence of key factors such as income inequality, the materialization of the Hirsch conjecture, and characteristics of the network of relative preferences, is analised. We also frame the potential interest of positional consumption and this model in particular in the context of the ongoing discussion among evolutionary economists on the behaviour of demand.     

SYNCHRONISING DEREGULATION IN PRODUCT AND LABOUR MARKETS

Deregulation typically comes with redistribution of rents and thus with opposition from the losing interest groups. We show that, by exploiting complementarities, synchronising deregulation across markets makes this opposition lower. Indeed, a particular deregulation may reduce rents for one interest group, but may result in gains for another interest group. Synchronising reforms can therefore offer a way out of the ‘sclerosis’ of especially European markets. For this effect, we build a microeconomic model based on two assumptions: Cournot competition à la Vives in the product markets and firms hiring workers in accordance with an efficiency wage in the labour markets. As being particularly relevant for European economies, we focus on product market regulation that determines the degree of market integration and labour market regulation that determines the degree of employment protection.     

Do (Fe)Male Auditors Impair Audit Quality? Evidence from Going-Concern Opinions

Recent research indicates that there may be a relationship between the characteristics of the audit engagement partner and audit quality. In this paper, we examine the relationship between audit quality and the presence of a female or male audit engagement partner. We use the likelihood that an auditor issues a going-concern opinion (GCO), conditional on the client's financial situation, as an indicator of audit quality. Using a sample of 7105 financially distressed, private Belgian companies, we find that female auditors are, ceteris paribus, more likely to issue GCOs than male auditors. Our results also show that this effect is stronger when clients are either important (i.e. represent a material portion of the auditor's revenues) or high-risk (i.e. associated with increased uncertainties and risks). Collectively, these results indicate higher audit quality by female auditors.     

Incentives to invest and to give access to non-regulated new technologies

We analyze the incentives of a vertically integrated firm, which is a regulated monopolist in the wholesale market and competes with an entrant in the retail market, to invest and to give access to a new wholesale technology. The new technology represents a non-drastic innovation that produces retail services of a higher quality than the old technology, and is left unregulated. We show that for intermediate values of the access price for the old technology, the vertically integrated firm may decide not to invest. When investment occurs, the vertically integrated firm may be induced to give access to the entrant for a low access price for the old technology. Furthermore, when both firms can invest, investment occurs under a larger set of circumstances, and it is the entrant the firm that invests in more cases. We also discuss the implications for the regulation of the old technology.     

Commercial Banks in the Securities Business: A Review

This paper analyses the potential effects of commercial banks' expansion into the securities business in the context of the contemporary theory of financial intermediation. The analysis focuses on the gains claimed to emerge with that expansion, particularly the gains due to information advantages and economies of scope, and on the costs also claimed to arise with it; namely, those due to conflicts of interest and safety and soundness considerations. The paper ends with a discussion on how these effects depend on the location of the securities unit within the banking conglomerate.