Why do they return? Beyond the economic drivers of graduate return migration

This paper explores the factors that shape the location choices of formerly mobile graduates (FMGs) initially resident in Sardinia, Italy, a less developed European region. Combining qualitative and quantitative techniques, the paper examines the reasons why some individuals decide to return after their studies, the factors that shape their decisions and how these choices unfolded in space and time. It counters the literature, which suggests that migration is a one-off linear process driven only by wealth-maximising behaviour, positing rather that access to opportunities in open meritocratic job markets and circular migration trajectories are far more salient to FMGs. This suggests that policy makers should concentrate on promoting labour market opportunities and invest in social networks that will aid brain circulation.     

Does climate matter? An empirical study of interregional migration in China

This study focuses on the role of local climate conditions in spurring interregional migration in China over the period 2000 to 2010. We developed a robust empirical approach based on a correlated random effects model and a prefecture-level panel dataset which allows us to account for both within province migration flows and prefecture-specific characteristics. Empirical results reveal that climate conditions are important determinants of migration in China. Specifically, prefectures with warmer winter, cooler summer, and more available sunshine are more attractive to migrants. Economic factors such as income level and employment opportunities are also important drivers of population growth.     

The effects of industrial diversification on regional unemployment in Taiwan: is the portfolio theory applicable?

Unemployment issues, particularly recently, have been the subject of heated rhetoric in Taiwan due to the currently high unemployment rate in this small open economy. This paper investigates regional unemployment in 23 counties or cities from 1982 to 2004. Izraeli and Murphy (Ann Reg Sci 37:1–14, 2003) suggested that the Herfindahl index of industrial structure is positively correlated with the unemployment rate. In this regard, the portfolio theory argues that industrial diversification can only reduce volatility in the regional labor market. In other words, there is a relatively higher regional unemployment rate during periods of economic prosperity and relatively lower unemployment rate during periods of economic slowdown. This view is fully confirmed from the fixed effects model using panel data and the implication is that a comprehensive industrial policy to lower both the unemployment rate and risk in regional labor markets is critical in Taiwan today.     

Does the presence of desert dust modify the effect of PM10 on mortality in Athens, Greece?

Recent reports investigate whether windblown desert dust may exacerbate the short-term health effects associated with particulate pollution in urban centers. We have tested this hypothesis by using daily air pollution and mortality data for Athens, Greece during the period 2001-2006.We investigated the effects of exposure to particulate matter with aerodynamic diameter < 0 μg/m³ (PM₁₀) on total and cause specific mortality, during days with and without windblown desert dust, for all ages, stratified by age groups and by sex. We identified 141 dust days between 2001 and 2006. We used Poisson regression models with penalized splines to control for possible confounding by season, meteorology, day of the week and holiday effect.A 10 μg/m³ increase in PM₁₀ was associated with a 0.71% (95% confidence interval (CI): 0.42% to 0.99%) increase in all deaths. The effects for total and cause specific mortality were greater for those ≥ 75 years of age, while for total mortality higher effects were observed among females. The main effect of desert dust days and its interaction with PM₁₀ concentrations were significant in all cases except for respiratory mortality and cardiovascular mortality among those < 75 years. The negative interaction pointed towards lower particle effects on mortality during dust events.We found evidence of modification of the adverse health effects of PM₁₀ on mortality in Athens, Greece with desert dust events: the particle effects were significantly higher during non-desert dust days. Our analyses indicate that traffic related particles, which prevail on non-desert dust days, have more toxic effects than the ones originating from long-range transport, such as Sahara dust.     

Education and the location of work: a continued economic role for central cities?

Using data on individuals from the 2008 American Community Survey, we examine the relationship between educational attainment and the location of jobs in fifteen large metropolitan areas in the United States. We focus on whether individuals with higher educational attainment tend to work in the central city versus the suburbs, and we do so taking into account the residential location of households (central city vs suburb). We show that central cities tend to be the work site of more highly educated workers—those with a bachelor’s degree and above. Workers with less than a high school degree also tend to work in the city. Taking account of the residential location preferences of highly educated workers mildly diminishes the direct effect of higher education on city job location, but it does not negate it. In contrast, central city job opportunities for workers with less than a high school education are not so abundant; these workers tend to work in the city mostly because they also live there.     

Overeducation and overskilling in the early careers of PhD graduates: Does international migration reduce labour market mismatch?

This paper examines the effect of international mobility on the education-job mismatch and skill-mismatch of PhD graduates after controlling for self-selection into cross-border mobility. Using individual-level data from two waves of surveys of PhD recipients in Italy conducted by the Italian National Institute of Statistics, we find that migration to foreign countries reduces significantly the risk of overeducation and overskilling. These results remain robust to different empirical methodologies and subsamples.     

Foreigners versus natives in Spain: different migration patterns? Any changes in the aftermath of the crisis?

The main aim of this study, which takes Spanish provinces over the periods 2004–2007 and 2008–2013 as case study, is threefold: first, to test whether labor factors affect to a greater extent foreigners than natives when it comes to migrating; second, to detect changes in migration patterns over the crisis period; third, to unveil nonlinearities in the relationship between migration and wages. To do so, an extended gravity model, combined with a methodology that identifies endogenous thresholds to nonlinear effects, is estimated. The results support that the role played by labor factors is more important for foreigners than natives, especially before the outbreak of the economic crisis. The results also indicate that the relative size of the service sector and, to a lesser extent, climate conditions have gained importance as attraction factors for natives over the crisis, while the opposite happens for foreigners. Therefore, evidence clearly supports the idea that business cycle modifies the decision making of migrants. Finally, some nonlinearities in the effect of expected wages on migration are found regardless of the group and/or time frame considered.     

Does the reuse of PET bottles during solar water disinfection pose a health risk due to the migration of plasticisers and other chemicals into the water?

Solar water disinfection (SODIS) is a simple, effective and inexpensive water treatment procedure suitable for application in developing countries. Microbially contaminated water is filled into transparent polyethylene terephthalate (PET) plastic bottles and exposed to full sunlight for at least 6 h. Solar radiation and elevated temperature destroy pathogenic germs efficiently. Recently, concerns have been raised insinuating a health risk by chemicals released from the bottle material polyethylene terephthalate (PET). Whereas the safety of PET for food packaging has been assessed in detail, similar investigations for PET bottles used under conditions of the SODIS treatment were lacking until now. In the present study, the transfer of organic substances from PET to water was investigated under SODIS conditions using used colourless transparent beverage bottles of different origin. The bottles were exposed to sunlight for 17 h at a geographical latitude of 47° N. In a general screening of SODIS treated water, only food flavour constituents of previous bottle contents could be identified above a detection limit of 1 μg/L. Quantitative determination of plasticisers di(2-ethylhexyl)adipate (DEHA) and di(2-ethylhexyl)phthalate (DEHP) revealed maximum concentrations of 0.046 and 0.71 μg/L, respectively, being in the same range as levels of these plasticisers reported in studies on commercial bottled water. Generally, only minor differences in plasticiser concentrations could be observed in different experimental setups. The most decisive factor was the country of origin of bottles, while the impact of storage conditions (sunlight exposure and temperature) was less distinct. Toxicological risk assessment of maximum concentrations revealed a minimum safety factor of 8.5 and a negligible carcinogenic risk of 2.8 × 10⁻⁷ for the more critical DEHP. This data demonstrate that the SODIS procedure is safe with respect to human exposure to DEHA and DEHP.     

What is the role of tensile cracks in cohesive slopes?

The traditional limit equilibrium method (LEM) is often used to search for the failure surface with a minimum safety factor of slope. In this method, the failure surface is considered as a shear surface, irrespective of its form. However, tensile cracks are frequently found at the outcrops of landslides. In this study, three sets of tests on small-scale landslides with different inclination angles were conducted. The test results demonstrated that tensile cracks could arise in the slope sliding process and the failure surface is composed of both a shear and a tensile fracture surface. Based on the test results, we used the improved LEM, and replaced the traditional shear failure surface by a tensile-shear coupling one, thus new tensile failure modes for slope stability analysis can be established. The safety factors of slope in different failure modes were compared, which show that when considering soil tensile failure and tensile strength less than a certain value (e.g. 15 kPa, 44 kPa and 55 kPa for linear, circular and logarithmic spiral failure surfaces, respectively), the safety factors of slope with three different failure surfaces are less than the one that did not consider the tensile failure. The most critical failure surfaces of the slope may be composed of shear and tensile damages because the tensile strength of the soil cannot be generally greater than its cohesion.     

Does having the right visitor mix do the job? Applying an econometric shift-share model to regional tourism developments

This paper is the first to apply an econometric shift-share model to tourism. The approach allows us to isolate the growth contributions of changes in regional touristic attractiveness from those induced by the structure of visitors, but does not share the caveats of the conventional shift-share approach. Our application to regional tourism in Austria reveals important results: First, differences in long-run performance between regions are mostly related to idiosyncratic changes in the tourist appeal of individual regions rather than a result of more or less favorable structures of visitors. Second, none of several mega-events during the period observed seem to have left prolonged positive effects on the tourist performance of the host regions. And third, performance appears uncorrelated with tourism intensity of a region. Thus, from a policy and destination management perspective, tourism authorities and local suppliers should mainly focus on upgrading the permanent destination attractiveness rather than investing too much effort into landing mega-events or targeting the visitor mix toward promising source markets.     

What role does the real estate–construction sector play in China’s regional economy?

Urbanization, industrialization and real estate reform have led to a vast growth of the real estate–construction sector in China. Using the 2002 and 2007 provincial input–output tables, this paper examines the importance of the real estate–construction sector in the Chinese economy by applying the hypothetical extraction method. The results show that for the 30 studied provinces, the weighted average impact of the real estate–construction sector accounts for 21 % of total output and for approximately 14 % of all jobs in 2002. For 2007, these figures are 23 and 22 %, respectively. The impact of the real estate–construction sector on total output and employment varies across regions. In 2007, the direct and indirect output and employment of real estate–construction sector accounted for around 15 % of total regional output and employment in Shandong and Henan, and for 40 % in Tianjin, Jilin, Shaanxi, Ningxia and Xinjiang. Our results also indicate that the real estate–construction sector is strongly own final demand oriented and regional economies which highly rely on it are particularly vulnerable to a fall in its demand.     

Micro-analysis of the role of interfacial transition zone in “salt weathering” on concrete

When concrete elements are partially immersed in the sulfate environment, researchers always attribute “salt weathering”, “salt crystallization” or “physical attack” to the failure of concrete. However, there were few micro-analysis evidences to support this view. In this paper, an attempt was carried out to study whether salt weathering is really responsible for the concrete damage.As we know, the interfacial transition zone (ITZ) between paste and aggregate plays a determining role in the performance of concrete. In this paper, we focused on the role of ITZ in “salt weathering” on concrete. Concrete specimens, made with coarse aggregate and cement paste, were partially exposed to a 5% sodium sulfate solution and a 5% magnesium sulfate solution respectively, in a controlled environment (20 ± 2 °C, and 60 ± 5% RH). After 8 months of exposure, a micro-analysis is performed by means of XRD, ESEM and EDS. The experimental results showed that, in the upper part of concrete above the Na₂SO₄ solution, damage initiated in the ITZ between paste and aggregate due to the formation of ettringite and gypsum. Salt crystallization cannot occur on the paste surface in the ITZ, but it was found on the aggregate surface after damage initiation due to chemical sulfate attack. On the other hand, salt crystallization could occur in the carbonated concrete. There was no trace of salt crystallization in the concrete partially exposed to MgSO₄ solution.     

Is ecosystem structure the target of concern in ecological effect assessments?

The species sensitivity distribution, a technique currently used to derive water-quality standards of chemicals, is associated with a set of inadequately tested assumptions. One of these assumptions is that ecosystem structure is as or more sensitive than ecosystem function, i.e., that structure is the target of concern. In this paper, we tested this assumption for a simple freshwater ecosystem exposed to different toxicants. Using an ecosystem model, we calculated no observed effect concentrations (NOECs) for ecosystem structure (ecosystem structure-NOECs) and function (ecosystem function-NOECs) for each of 1000 hypothetical toxicants. For 979 of these toxicants, the ecosystem structure-NOEC was lower than or equal to the ecosystem function-NOEC, indicating that the tested assumption can be considered valid. For 239 of these 979 toxicants, both NOECs were equal. For half of the 1000 toxicants, the structure of lower trophic levels (i.e., phytoplankton) appears to be more sensitive than the structure of higher trophic levels (i.e., fish). As such, ecosystem structure-NOECs are primarily determined by the sensitivity of the structure of lower trophic levels. In contrast, ecosystem functions associated with higher trophic levels (e.g., total ingestion by fish) are more sensitive than functions associated with lower trophic levels (e.g., total photosynthesis by phytoplankton) for 749 toxicants.     

Do economic crises lead tourists to closer destinations? Italy at the time of the Great Recession

This article studies how distance influences the choice of tourists about their holiday destination during times of economic crisis. In particular, we analyse the specific case of domestic tourism flows across Italian regions during the 2000–2012 period by estimating a gravity model. Our estimations yield the effect of distance year by year. The output suggests that distance gained weight during the years of the Great Recession and therefore confirms, from a macroeconomic perspective, that tourists tend to choose closer destinations in times of crisis.     

The Role of Natural Settings in Crisis Rehabilitation: How Does the Level of Crisis Influence the Response to Experiences of Nature with Regard to Measures of Rehabilitation?

We compare people greatly affected by a crisis with those less affected to explore how level of crisis influences their response to experiencing nature. A questionnaire comprising a validated protocol to evaluate frequency of stress conditions, the level of crisis retention, reorientation and rehabilitation potential was answered by 547 individuals. The questionnaire also comprises items on everyday activities. Our findings may be interpreted as follows: experiencing nature has a more powerful influence on the rehabilitation potential of people greatly affected by a crisis; taking a walk also has an influence, although not of equal importance; the social factor has more influence on the rehabilitation potential of people affected by a crisis to a low/moderate degree. Individuals who have many experiences of nature are less affected by their crisis than are those who have few such experiences. We suggest that the rehabilitative effect of nature is tied to its function as an enriched environment. During stays in natural settings, an interaction takes place between sensory stimulation, emotions and logical thought—an interaction that leads to a new orientation and new ways of seeing one's self and one's resources. This seems to largely be a question of how we human beings take in and process information.     

University mission creep? Comparing EU and US faculty views of university involvement in regional economic development and commercialization

The attitudes of university faculty towards the expansion of universities’ missions to include assisting regional economic development and technology development by knowledge commercialization are analysed. Based upon surveys of faculty in the EU and in the United States, as well as secondary data on the institutional characteristics of universities and their regional economic conditions, we find that faculty are significantly more supportive of their universities assisting regional economic development compared to knowledge commercialization that attitudes between the US and EU faculty are remarkably similar, and that individual factors, including academic discipline, are more powerful explanators of the variation in attitudes compared to institutional characteristics or regional economic conditions.     

Multi-level governance of regional economic development in Norway and Sweden: too much or too little top-down control?

Regional level has been identified as the key institutional level for economic development policies. However, in Norway and Sweden regional economic development as a policy field is to a limited extent placed under the control of directly elected regional parliaments, whereas the most important instruments for stimulating regional economic development and innovation are controlled by national government and regional state offices. In this article we discuss the theoretical and normative arguments for centralizing or decentralizing instruments for enhancing regional economic development and the implications of the fact that strong instruments for enhancing regional economic development are controlled by national government in these countries.     

Does fiscal decentralization affect the effectiveness of intergovernmental grants? European regional policy and Spanish autonomous regions

We suspect that the efficiency of intergovernmental grants is related to the level of fiscal autonomy of the subsidized government. In this paper we construct and estimate a panel data model capturing the role of fiscal federalism on the effectiveness of EU structural actions in enhancing public investment. We use data from the 17 Spanish regions for the period 1993–2007. Results unambiguously support the hypothesis that the effectiveness of the structural funds decreases with larger fiscal autonomy, which could reflect the fact that fiscal decentralization in Spain has been focused to larger taxation autonomy without affecting regional income redistribution.