Do missing values exist? Incomplete data handling in cross-national longitudinal studies by means of continuous time modeling

In cross-national longitudinal studies it is often impossible to administer the same measurement instruments at the same occasions to all sample units in all participating countries. This quickly results in large quantities of missing data, due to (a) missing measurement instruments in some countries, (b) missing assessment waves within or across countries, (c) missing data for individual sample units. As compared to cross-sectional studies, the problem of missing values is further aggravated by the fact that missing values are always associated with different time intervals between repeated observations. In the past, this has often been dealt with by the use of phantom-variables, but this approach is limited to simple designs with few missing value patters. In the present paper we propose a new way to think of, and deal with, missing values in longitudinal studies. Instead of conceiving of a longitudinal study as a study with \(T\) discrete time points of which some are missing, we propose to conceive of a longitudinal study as a way to measure an underlying process that develops continuously over time, but is only observed at some selected discrete time points. This transforms the problem of missing values into a problem of unequal time intervals. After a quick introduction to the basic idea of continuous time modeling, we demonstrate how this approach provides a straightforward solution to missing measurement instruments in some countries, missing assessment waves within or across countries, and missing data for individual sample units.     

Technology commercialization intelligence: Organizational antecedents and performance consequences

External technology commercialization, e.g., by means of technology licensing, has recently gained in importance. Despite imperfections in technology markets, out-licensing constitutes a major technology commercialization channel. Although the identification of licensing opportunities represents a significant managerial challenge, prior research has relatively neglected these activities. Therefore, we develop the concept of ‘technology commercialization intelligence’ (TCI), which refers to the observation of a firm's environment with particular focus on identifying technology licensing opportunities. Grounded in a dynamic capabilities perspective, we test five hypotheses regarding organizational antecedents and performance consequences of TCI, drawing on data from a survey of 152 companies. The empirical findings provide strong support for the importance of the TCI concept. The findings deepen our understanding of the discrepancies between successful pioneering firms active in technology licensing and many others being less successful. The results have major implications for technology exploitation in open innovation processes.     

From sponsorship to partnership in academy-industry relations

One practical result of the advent of the knowledge society has been an increased reliance on academic-industry partnerships as important sources for the creation of economic value. This paper argues that this renewed emphasis on knowledge has led to a shift in the nature of the relations between the academy and industry from sponsorship to partnership and the formation of new research institutions that allow researchers and practitioners to engage in continuous rather than problem based dialogue. These developments are illustrated by providing a case study based on the experience of one research team with its industrial partners. The paper presents results pertaining to some of the issues and challenges raised by continuous dialogue in partnerships, and emphasises the creative yet demanding implications of close collaboration between the two communities.     

Chris Willett (Ed.): Public Sector Reform and the Citizen's Charter. London: Blackstone Press, 1996.

Journal of Consumer Policy -     

No Terroir in the Cold? A Note on the Geography of Geographical Indications

Geographical Indications (GIs) are increasingly important instruments of agricultural and food regulations and are growing as contentious issues in trade negotiations and disputes. GIs can improve welfare but they can also be a protectionist instrument. The EU has the most GIs in the world, but they are concentrated in the south of the EU. Even excluding wine, there are seven times more food GIs per capita in the southern EU Member States than in other EU Member States. This note discusses several factors which may explain the geographic concentration of GIs in the south of the EU.     

Technology Adoption,Vertical Coordination in Value Chains,and FDI in Developing Countries: Panel Evidence from the Dairy Sector in India (Punjab)

Review of Industrial Organization - (Global) value chains have contributed to agricultural technology adoption in transition countries and food export commodities in developing countries through...     

POVERTY, TNEQUALTTY, AND FAMTLY LIVING STANDARDS IMPACTS ACROSS SEVEN NATIONS: THE EFFECT OF NONCASH SUBSIDIES FOR HEALTH, EDUCATION AND HOUSING

The main aim of this paper has been to summarize the impact of noncash income–health and health education benefits, and imputed rent-on living standards, income distribution and poverty in seven nations at the beginning of the 1980s using the Luxembourg Income Study database. Our results do not give rise to a pattern of national differences in poverty rates or income inequality which are markedly different from that which emerges from previous LIS research based on cash income alone. While these results may be sensitive to the techniques used to measure and value noncash benefits in this paper, it appears that noncash income reinforces the redistributive impact or conventional (cash) tax-transfer mechanisms rather than acting to offset them in any major way.     

Transition and agricultural labor

Reforms have strongly affected agricultural employment in transition countries but in remarkably different ways. We present a theoretical model and an empirical analysis to explain differences in labor adjustment during transition. We show that the differences are due to a combination of variations in initial conditions and differences in reform policies and effects. The removal of price distortions and subsidies caused wage and price adjustments during transition and a reduction in labor demand in agriculture. Surplus labor outflow from agriculture was further stimulated by the privatization of the farm assets as they improve incentives and remove constraints for optimal factor allocation and structural adjustment. The shift to individual farms, which was especially strong in labor‐intensive production systems with low labor productivity in agriculture, has reduced the outflow of labor from agriculture by improving farm governance and labor efficiency, although this effect was mitigated by losses in scale economies due to disruptions and market imperfections in transition. In general, labor outflow was considerably lower on individual farms than on corporate farms, due to a combination of factors related to human capital, access to finance, and physical capital. In the last section of the article we present a general framework for understanding labor adjustments in transition countries. Specifically, we show that there are several patterns of labor transition. In one pattern, followed by, e.g., the Czech Republic and Hungary, there is initially a strong survival of the restructured large‐scale corporate farms that have laid off many workers. In the second phase of transition, gradually the importance of individual farms increases. In other countries, such as Romania, the opposite has happened. In these countries there is an immediate strong shift to individual farms, while labor use increases on average in agriculture. After this initial phase, the shift to individual farms continues, albeit more slowly, and labor use in agriculture starts to decline. Finally, our analysis shows that in countries such as Russia and Ukraine much of the surplus labor is still employed by little‐reformed former collective and state farms. Major adjustments await more progress in agricultural and general reforms.     

A PROTOTYPE MICRO-MACRO LINK FOR THE CANADIAN HOUSEHOLD SECTOR

This paper seeks to forge a link between Canadian macro and micro data relating to the household sector. The analysis is in three parts. The first part begins with National Accounts data on the personal sector. These data are adjusted to remove transactions relating to non-biological persons, so that the result is income and expenditure for the household sub-sector. The second part starts with the annual household survey used to collect income distribution data. These survey data are augmented in various ways to account for under-reporting and to add information from other micro data sets particularly the periodic survey of household expenditure patterns and a sample of individual income tax returns. The result is a comprehensive, albeit partially synthetic, household micro data set. In the final part of the paper these two largely independent data sets are compared, and the general quality of the results is discussed.