M regression approach for satisfaction of municipality services: the case of Eskisehir

Studies on increasing the effectiveness of municipality services will be carried out only by measuring and increasing the public’s satisfaction with the services. Such studies are considered as feedback for increasing the quality of municipality services and maintaining the productivity of these services. In recent years, thanks to the services provided in line with the understanding of social municipality services, Eskisehir, which has become one of the most popular cities in Turkey, set an example for the municipalities of other cities. The purpose of the present study was to determine the factors influencing the degree of public satisfaction with the services provided by the Metropolitan Municipality of Eskisehir and to establish a mathematical model determining the public’s level of overall satisfaction with the services. In the study, first, the attitudes of the public in Eskisehir towards the services of the Metropolitan Municipality of Eskisehir were examined via factor analysis. As a result of the analysis, the factor scores regarding the factors obtained from the public’s satisfaction with the municipality services were considered as independent variables, and a mathematical model determining the public’s level of overall satisfaction with the services was created. Because, while creating this model, outliers were found in y direction within the data set, M regression analysis, resistant to such outliers, was applied. With the help of the mathematical model established as a result of the study, it was possible to determine all the factors influencing the public’s overall satisfaction with the municipality services and to find out how influential these factors were on the degree of their satisfaction with such municipality services as the transportation and traffic regulations, cultural and art activities, environmental cleaning and planning and arrangement of parks/gardens and sports areas.     

Time‐Varying Spillover Effects on Sectoral Equity Returns

In this paper, we investigate the integration of the Euro‐ and US‐wide sector equity indices by focusing on the return, volatility, and trend spillover effects of local and global shocks. We explore that unlike volatility spillovers, return spillovers are not significant enough to explain sector equity returns. Moreover, we are able to show that when the trend is incorporated into the volatility spillover analysis, a number of sector equity indices tend to react similarly to local and global shocks. Following this path, we arrive at four major sector groups: production and industry; consumer goods and services; financial; and technology, media, and telecommunication across Euro‐ and US‐wide sector equity indices.     

Decomposing the Income Insurance Channel across OECD and Emerging Markets

This paper investigates the underlying forces driving income insurance channels for the Organisation for Economic Co‐operation and Development (OECD) and emerging markets. We find income insurance channels across countries to be driven by different subchannels. For the OECD, income insurance is mostly governed by payments for financial liabilities; for the emerging markets, income flows from nationals working abroad constitute the main income smoother. Despite the growth in cross‐border financial asset trading over the years, we could not find evidence of income smoothing via foreign assets receipts for the OECD. For the majority of emerging markets, neither receipts of foreign assets nor foreign liability payments are strong enough to insure income as well.     

Median-unbiased estimation of structural change models: an application to real exchange rate persistence

Measuring deviations from purchasing power parity has been the subject of extensive investigation. The most common practice in empirical research for measuring real exchange rate persistence is to estimate univariate autoregressive (AR) time series models and calculate the half-life, defined as the number of periods for a unit shock to a time series to decay by 50%. In the presence of structural change, there are two potential biases in the parameter estimates of AR models: (1) a downward small sample median-bias and (2) an upward bias, which occurs when structural change is present and ignored. We conduct a variety of Monte Carlo simulations and demonstrate that the existence of structural change causes a substantial increase in the small sample bias documented in Andrews (1993). We then propose an extension of median-unbiased estimation, which explicitly accounts for structural change, and apply these methods to estimate half-lives of several long-horizon real exchange rates analysed by Lothian and Taylor (1996) and Taylor (2002). The upward bias from neglecting structural change dominates the downward median-bias for these real exchange rates. When structural change is present and accounted for, the median-unbiased half-lives towards a changing mean decrease and the confidence intervals tighten.     

A Survey of New Product Evaluation Models

New product development is a dynamic and lengthy process ranging from idea generation through product launch. It is quite important that product managers evaluate the viability of a new product at every stage of its development. Previous literature provides a large number of models that can be used to evaluate new products at different stages of the new product development process. These models vary with respect to their objectives, applicability to different products, data requirements, suitable environments and time frames, and diagnostics. This article presents a critical review of the models with an emphasis on these factors. The article also outlines other emerging methods that companies are using today. It concludes with managerial and research implications. © 1999 Elsevier Science Inc.     

Foreign portfolio diversification and risk-sharing

We investigate income smoothing associated with international portfolio diversification by decomposing the net factor income (NFI) channel into interests, dividends and retained earnings, for OECD and EU countries. We find that interest receipts and equity dividend payments contribute significantly to absorb domestic income shocks. Geographically concentrated portfolios and, in particular, biases toward EU markets have a strong negative effect on the degree of risk-sharing.     

The Roles of Knowledge Providers,Knowledge Recipients,and Knowledge Usage in Bridging Structural Holes

Studies have suggested that firms can benefit from bridging two or more otherwise disconnected firms in their ego networks (i.e., structural holes) as a potentially useful source of external knowledge for innovation. However, past research also noted that the relationship between bridging structural holes and firm innovation varies significantly. Building on the earlier research that has examined the industrial, structural, and institutional dimensions of this relationship, the purpose of this research is to study how the different characteristics of the external knowledge provided by bridging structural holes in a focal firm’s ego network might moderate the relationship between bridging structural holes and firm innovation. Using longitudinal data from the U.S. computer industry, this study showed that focal firms that bridged otherwise disconnected firms in their ego networks enjoyed higher levels of innovation. In addition, it showed that this relationship was particularly stronger when the focal firms and the disconnected firms that they bridged operated in similar rather than different markets but when the focal firms and the disconnected firms worked on different rather than similar technological domains. The results also revealed that the relationship was stronger when the focal firms’ knowledge specialization was low rather than high and when the focal firms emphasized incremental rather than breakthrough innovation. These findings show companies how they can benefit from bridging otherwise disconnected firms in their ego networks and help them make more informed decisions pertaining to such bridging activities.     

Financial services spillover effects on informal economic activity: evidence from a panel of 20 European countries

ABSTRACT

This study aims to investigate the spillover effects of the financial services sector development on the size of informal economic activity in the case of the European Union (EU) countries. The results from panel data analysis show that there exists an inverted U-shaped relationship between financial services and informal economic activity in the EU; that is, at the initial levels of the financial development, the reaction of informal economic activity is positive while it becomes negative at the further stages of the financial development in the EU. Thus, this study finds that financial services sector is a major contributor to changes in the volume of informal economic activity in the EU countries.     

Risk sharing in the Middle East and North Africa

This study investigates welfare gains and channels of risk sharing among 14 Middle Eastern and North African (MENA) countries, including the oil‐rich Gulf region and the resource‐scarce economies such as Egypt, Morocco and Tunisia. The results show that for the 1992–2009 period, the overall welfare gains across MENA countries were higher than those documented for the Organization for Economic Cooperation and Development (OECD) nations. In the Gulf region, the amount of factor income smoothing does not differ considerably when output shocks are longer lasting rather than transitory, whereas the amount smoothed by savings increases remarkably when shocks are longer lasting. In contrast, both factor income flows and international transfers respond more to permanent shocks than to transitory shocks in the non‐oil MENA countries. The results also show that a significant portion of shocks is smoothed via remittance transfers in the economically less‐developed MENA countries, but not in the oil‐rich Gulf and OECD countries. Finally, for the overall MENA region, a large part of the shock remains unsmoothed, suggesting that more market integration is needed to remedy the weak link of incomplete risk sharing.     

Interaction effects in econometrics

We provide practical advice for applied economists regarding robust specification and interpretation of linear regression models with interaction terms. We replicate a number of prominently published results using interaction effects and examine if they are robust to reasonable specification permutations.