Climatic Factors as Determinants of International Migration

We examine natural disasters and long‐run climatic factors as potential determinants of international migration, implementing a panel dataset of bilateral migration flows from 1960 to 2000. We find no direct effect of long‐run climatic factors on international migration across our entire sample. These results are robust when conditioning on origin‐country characteristics, when considering migrants returning home, and when accounting for the potential endogeneity of migrant networks. Rather, we find evidence of indirect effects of environmental factors operating through wages. We find that epidemics and miscellaneous incidents spur international migration, and there is strong evidence that natural disasters beget greater flows of migrants to urban environs.     

LABOUR MOBILITY AND TRANS‐TASMAN CURRENCY UNION*

The prospect of a common currency for Australia and New Zealand has been canvassed by senior poli‐ticians and bureaucrats, and has been the subject of academic debate. According to Mundell (1961 ), a high degree of internal labour mobility is a desirable feature of currency unions. This study looks at the extent to which long‐term migration between Australia and New Zealand responds to output shocks. Estimated VAR models and panel Granger‐causality tests demonstrate that shocks to relative per capita output have a significant and symmetrical impact on migration flows between Australia and New Zealand, and most of the impact is felt after about one year. Separating the shocks to Australia and New Zealand shows that ‘pull’ effects are more important than ‘push’ effects. Additionally, the trajectory of the Australian economy proves particularly influential for the choice of New Zealand emigrants. Although permanent migration responds intuitively to the state of the economy in Australia and New Zealand, the level of these migration flows is low in comparison to Australian inter‐state migration; yet it is high in relation to any third country.     

International migration and trade agreements: The new role of PTAs

This paper provides an empirical analysis of the relationship between preferential trade agreements (PTAs) and bilateral migration flows. Building on the empirical literature on the determinants of migration flows, I estimate a modified gravity model to assess the role of PTAs and their content on bilateral migration flows. Using a sample of 29 OECD destination countries over the period 1998–2008, I show a strong positive effect of PTAs on bilateral migration flows. I find that the content of PTAs also matters: when visa‐and‐asylum and labour market related provisions are included in PTAs, this further stimulates bilateral migration flows. Different estimation strategies, including instrumental variables, are employed to address the potential endogeneity bias problems related to PTAs and their content.     

Climate change, health and migration in urban China

In this paper, I empirically investigate the effect of climate change on health and migration in China. Using urban survey data sets from different Chinese cities, I find that an increase in female morbidity is associated with current high temperature change, especially for the symptom of frailty; past hot weather is related to the exacerbation of health problems in women, and the effect on females is larger than that on males who migrate from rural areas to cities; past temperature change is also correlated with a higher probability of chronic symptoms for females. I also find that migration preference from a rural area to a city is correlated with avoiding exposure to hot weather shocks, which shows a regressive tendency. Finally, the migration preferences of male residents who migrate from one city to another city are not associated with the effects of past low temperature changes on health.     

Intertemporal Consumption Smoothing and Capital Mobility: Evidence from Australia

This paper examines the optimality of international capital flows to Australia, a persistent net importer of capital, during its post‐capital controls period 1984–99. The evolution of Australia’s current account balance is compared against a benchmark derived from an optimising model of intertemporal consumption smoothing. The consumption‐smoothing approach to the determination of the current account implies that international capital flows act as a buffer to smooth aggregate consumption in the face of temporary shocks to the economic fundamentals: changes in national cash flow (that is, changes in the level of output, investment or government spending). It is found that in the early 1990s a structural break occurred in the relationship between consumption and national cash flow, which coincides with a switch from debt‐financing to equity‐financing of the current account deficit. In the decade of the 1990s following this structural break (and unlike the decade of the 1980s which preceded this break), international capital flows to Australia implied a path for consumption which was broadly consistent with expected‐utility maximisation under the consumption‐smoothing model of the current account.     

Interregional Migration of Human Capital and Unemployment Dynamics: Evidence from Italian Provinces

Since the mid‐1990s interregional migration flows in Italy have dramatically increased, especially from the South to the North. These flows are characterized by a strong component of human capital, involving a large number of workers with secondary and tertiary education. Using longitudinal data for the period 2002–2011 at NUTS‐3 territorial level, we document that long‐distance (i.e., South‐North) net migration of high‐skill workers has increased the unemployment at origin and decreased it at destination, thus deepening North–South unemployment disparities. On the other hand, long‐distance net migration of low‐skill workers has had the opposite effect, by lowering the unemployment at origin and raising it at destination. Further evidence also suggests that the diverging effect of high‐skill migration dominates the converging effect of low‐skill migration. Thus, concerns for an ‘internal brain drain’ from Southern regions look not groundless.     

Modelling the determinants of trans-Tasman migration after World War II

"This paper identifies the economic and demographic factors responsible for migration flows between Australia and New Zealand by means of a probabilistic model of emigration in both directions. The largely uncontrolled flows between the two countries have the same determinants as those commonly found in studies of internal migration. The cost of migration (proxied by the real cost of air travel), labour market conditions and the potential earnings differential play a role, although the results are modified by the incidence of return migration and age composition."     

IMPACT OF EXCHANGE RATE UNCERTAINTY ON COMMODITY TRADE BETWEEN THE US AND AUSTRALIA*

Exchange rate volatility is said to have negative or positive effect on trade flows. Previous studies that considered the impact of exchange rate uncertainty on the trade flows of Australia employed trade data either between Australia and rest of the world or between Australia and her few major trading partners. They were unable to discover any significant impact. In this paper when we disaggregate trade data by commodity between Australia and one of her major trading partners, the US, we find exchange rate volatility to have short‐run effects on trade flows of most industries. However, the short‐run effects last into long run, only in limited cases, though more in export commodities than import ones.     

Aggregate Fluctuations and International Migration

In this paper, we study the role of short‐run factors such as business cycles or changes in employment rates in explaining international migration flows. First, we derive a model of optimal migration choice predicting that short‐run economic fluctuations trigger migration flows on top of the impact exerted by long‐run factors. Second, we empirically test the magnitude of the effect of these short‐run factors on migration flows. Our results indicate that both aggregate fluctuations and employment rates affect migration flows. Third, we provide evidence that the Schengen Agreement and the euro significantly increased the international mobility of workers between the member countries.uuuü     

Developing Countries’ Net-migration: The Impact of Economic Opportunities,Disasters, Conflicts,and Political Instability

We provide regressions for the net immigration flows of developing countries. We show that (i) savings finance emigration and worker remittances serve to make staying rather than migrating possible; (ii) lagged dependent migration flows have a negative sign in the presence of migration stock variables; (iii) stocks of migrants in six OECD countries and in the developing countries have non-linear effects. Some of the non-linear effects of the economic variables vanish if indicators for disasters, conflicts and political instability are taken into account but new ones come in for these latter variables.     

Modelling the Determinants of Trans-Tasman Migration after World War II*

This paper identifies the economic and demographic factors responsible for migration flows between Australia and New Zealand by means of a probabilistic model of emigration in both directions. The largely uncontrolled flows between the two countries have the same determinants as those commonly found in studies of internal migration. The cost of migration (proxied by the real cost of air travel), labour market conditions and the potential earnings differential play a role, although the results are modified by the incidence of return migration and age composition.     

A nonlinear approach to the U.S.–Australia commodity trade and the J‐curve: Evidence from 123 industries

The application of nonlinear models and asymmetric analysis have recently proven to yield results that are superior to those of the linear and symmetric analysis. However, the new approaches in testing the J‐curve between Australia and the rest of the world or between Australia and her trading partners such as the United States did not yield any significant outcomes. Suspecting that those results suffer from aggregation bias, we apply new methods to the trade flows of 123 industries that trade between the United States and Australia and give evidence of an asymmetric J‐curve in 28 industries. Furthermore, we find short‐run asymmetric effects of exchange rate changes on the trade balance of almost all studies, short‐run impact asymmetric effects in 27 industries and significant long‐run asymmetric effects in 56 industries. Our findings are industry‐specific.     

气候变化对湖南省农业水旱灾害的影响研究方法探讨

随着全球气候变化的不断加剧,区域气温、降水、辐射等都发生了重大变化,其对农业发展也具有重要影响,研究气候变化对湖南农业水旱灾害的影响及适应性对策有利于减小灾害性天气及气候系统对湖南省农业的影响,适时找出适合湖南区域特点的应对措施,并进一步完善当前全球气候变化对农作物生长研究的不足。基于英国哈德莱气候中心的区域气候模式PRECIS系统的区域尺度气候情景模拟结果,借助于GIS技术运用EPIC和SWAT模型分别模拟未来不同气候情景下湖南水稻产量和水资源的变化,通过对过去50年气候变化及其对水稻模拟产量的影响研究,可以总结湖南省应对气候变化引发的水旱灾害的策略和方法,并进一步提出未来气候变化情景下的适应性对策,可以为政府和相关决策部门应对未来水旱灾害的适应性对策提供参考依据。     

Diasporas

Migration flows are shaped by a complex combination of self-selection and out-selection mechanisms, both of which are affected by the presence of a diaspora abroad. In this paper, we analyze how existing diasporas (the stock of people born in a country and living in another one) affect the size and human-capital structure of current bilateral migration flows. Our analysis exploits a bilateral data set on international migration by educational attainment from 195 countries to 30 OECD countries in 1990 and 2000. Based on simple micro-foundations and controlling for various determinants of migration, we found that diasporas increase migration flows and lower their average educational level. Interestingly, diasporas explain majority of the variability of migration flows and selection. This suggests that, without changing the generosity of family reunion programs, education-based selection rules are likely to have moderate impact. Our results are highly robust to the econometric techniques, accounting for the large proportion of zeros and endogeneity problems.     

Foreign Aid in the Aftermath of Large Natural Disasters

This paper examines Official Development Assistance (ODA) in the aftermath of large natural disasters between 1970 and 2008. Using an event‐study approach, the paper finds that while the median increase in ODA is 18% compared with pre‐disaster flows, the typical surge is small in relation to the size of the affected economies. Moreover, aid surges typically cover only 3% of the total estimated economic damages caused by the disasters. The main determinants of post‐disaster aid surges are found to be the intensity of the event itself and the recipient country's characteristics such as the level of development, country size and the stock of foreign reserves. The paper does not find evidence that political considerations or strategic behavior on the part of donors determine the size of post‐disaster aid surges.     

Disentangling the migration-trade nexus: the pro-trade effects of immigrants and emigrants in the presence of vertical and horizontal product differentiation

This paper presents an exploration of the migration-trade nexus taking the case of Italy by crossing the two dimensions of migration (immigration and emigration) and the two dimensions of intra-industry trade (vertical and horizontal). This empirical strategy proves useful in refining interpretation of econometric results. In general, we find that both immigration and emigration are positively and significantly related to intra-industry trade. However, the magnitude and the statistical significance of the impact of migration on trade vary, depending on the type of trade flows considered (vertical or horizontal), the direction of migration (immigration or emigration) and the partner countries considered (OECD or non-OECD). In particular, we find that immigrants from non-OECD countries have a positive and significant impact on both ‘variety trade’ and ‘quality trade’, while immigrants from OECD countries significantly affect ‘variety trade’ only. Emigrants to non-OECD countries have positive effect only on ‘variety trade’. These findings are largely consistent with predictions deriving from theoretical models of intra-industry trade and from the literature on migration-trade nexus.     

Well-being effects of extreme weather events in the United States

The increase in weather and climate disasters in recent years has prompted an interest in analyzing their consequences and the mitigation and adaptation measures that can help minimize their potentially large impacts on individuals’ welfare. We match thirty-one billion-dollar disasters with individual survey data from the Behavioral Risk Factor Surveillance System to estimate the effect of extreme weather events on the subjective well-being of U.S. residents. Our results indicate that natural disasters have a negative and robust impact on subjective well-being in the affected communities, and that, on average, this impact peaks 6 months after the event, and then decays over time. We then investigate the attenuating impact of health care access, flood insurance, and governmental assistance programs and find a partial compensating role for risk-transfer and relief measures. We also find that stronger emotional and social support mitigates the negative impact of natural disasters.     

Why do immigrant workers in Australia perform better than those in Canada? Is it the immigrants or their labour markets?

Research comparing the labour market performance of recent cohorts of immigrants to Australia and Canada points to superior employment and earnings outcomes in Australia. Examining Australian and Canadian Census data between 1986 and 2006, we find that this performance advantage is not driven by differences in broader labour market conditions affecting all new labour market entrants. Rather, the results from comparing immigrants from a common source country – either the U.K., India, or China – suggest that Australian immigrants perform better, particularly in average earnings, primarily because of a different source country distribution. Moreover, the recent tightening of Australian selection policy, most notably its use of mandatory pre‐migration English‐language testing, appears to be having an effect, primarily by further shifting the source country distribution of immigrants away from non‐English‐speaking source countries, rather than in identifying higher‐quality migrants within source countries.     

关于当前农业气象预警的思考

中国是世界上遭受气象灾害影响最为严重的国家之一。在全球气候变暖的背景下,洪涝、干旱、暴雪、冰冻、高温等极端气象灾害发生的频率呈明显增长趋势。目前,中国大多数城市都建立了灾害性天气预警机制,但由于多种原因,农业气象灾害的预警和应急建设还比较落后。根据当前中国农业气象灾害预警的现状提出了农业气象预警及应急机制的建设措施。     

A Crook is a Crook … But is He Still a Crook Abroad? On the Effect of Immigration on Destination‐Country Corruption

This paper analyzes the impact of migration on destination‐country corruption levels. Capitalizing on a comprehensive dataset consisting of annual immigration stocks of OECD countries from 207 countries of origin for the period 1984–2008, we explore different channels through which corruption might migrate. We employ different estimation methods using fixed effects and Tobit regressions in order to validate our findings. Moreover, we also address the issue of endogeneity by using the Difference‐Generalized Method of Moments estimator. Independent of the econometric methodology, we consistently find that while general migration has an insignificant effect on the destination country's corruption level, immigration from corruption‐ridden origin countries boosts corruption in the destination country. Our findings provide a more profound understanding of the socioeconomic implications associated with migration flows.