253 research outputs found
THYMUS-DERIVED CELL (T CELL) ACTIVATION BY HETEROLOGOUS ANTIGENS AS A REPLACEMENT OF SPECIFIC IMMUNE T CELLS IN THE TRANSFER OF THE SECONDARY RESPONSE TO SHEEP ERYTHROCYTES
Spleen cells from LAF1 mice hyperimmune to sheep erythrocytes (SE) lost their ability to transfer a secondary response to irradiated recipients after incubation with anti-θ and rabbit complement in vitro. Small numbers of specific immune cells even when taken 3 days after a primary SE injection reconstituted the direct and indirect plaque-forming cell responses. Larger numbers of cells sensitized to B. abortus (or keyhole limpet hemocyanin), and given together with the corresponding antigen, also partially reconstituted the ability to respond to SE. This property was mediated by θ-bearing cells and was interpreted as due to a nonspecific humoral factor liberated by specifically activated T cells and acting on B cell proliferation or maturation
Understanding Foreign Direct Investment in East Asia
We recount East Asia's experience with foreign direct investment (FDI). We document that, contrary to the Rybczynski theorem, capital flows in the region cause the host country's labor-intensive industry to expand and its capital-intensive industry to decline. We also present narrative evidence that sheds light on how FDI is affected by the host's country's locational advantages, whether Asian FDI is footloose, and how the PRC has become the center of Factory Asia. Finally, we show that the evolution of production networks in the region can be explained partly by changes in the service cost of linking geographically separated production blocks relative to the cost saving arising from slicing up the value chain
Investigating the Effect of Exchange Rate Changes on Transpacific Rebalancing
This paper investigates the role that exchange rate changes can play in rebalancing transpacific trade. It presents evidence from a gravity model indicating that the exports from the People's Republic of China (PRC) to the United States (US) are a key outlier in the global economy and that imbalances between the PRC and the US have remained large during the financial crisis that began in September 2008. It then reports that an appreciation of the yuan against the dollar would be required to rebalance bilateral trade between the US and the PRC. In the case of multilateral trade between the US and the rest of the world, on the other hand, the evidence indicates that a depreciation of the dollar would not substantially reduce the US global trade deficit. In the case of Asia's exports, results presented here and elsewhere indicate that: (i) sophisticated exports produced within regional production networks depend on exchange rates throughout the region; (ii) labor-intensive exports from developing Asian countries are strongly influenced by each country's own exchange rate; (iii) developing Asian countries compete extensively with each other in exports to third markets; (iv) a currency appreciation in developing Asia would increase capital and consumption goods imports; and (v) exchange rate volatility deters parts and components trade in Asia. These findings imply that Asia and the rest of the world would benefit if East Asian currencies could appreciate together against external currencies while maintaining relative currency stability within the region
Does Income Inequality Lead to Terrorism? Evidence from the Post-9/11 Era
We study the influence of income inequality on terrorism. Using cross-national data for 79 countries for the 2002-2012 period, we show that endogeneity matters to the inequalityterrorism relationship, e.g., because of the distributional effects of terrorism. Once endogeneity is properly accounted for by means of an instrumental-variable approach, higher levels of income inequality result in more terrorist activity. This finding is robust to different definitions of the dependent variable, different estimation techniques and different instruments for income inequality. Our finding that inequality fuels terrorism is consistent with relative deprivation theory which argues that conflict results from frustration over the actual distribution of economic resources within a society
Poor Children in Rich Households and Vice Versa: A Blurred Picture or Hidden Realities?
An expanding evidence base suggests that children experiencing monetary and multidimensional
poverty are not the same. This article breaks new ground by providing a unique mixed methods
investigation of drivers of child poverty mismatch in Ethiopia and Vietnam, considering the role of
measurement error and individualistic and structural factors. The analysis capitalises on large-scale secondary
quantitative panel data and combines this with purposively collected primary qualitative data in
both countries. It finds that factors at the household and structural level can mediate the effects of
monetary poverty in terms of multidimensional poverty and vice versa, but that the size and sign of these
effects are specific to place and time. The policy mix aiming to reduce all forms of child poverty need to
be targeted on the basis of a multidimensional assessment of poverty and reflect the complex and contextspecific
interactions between determinants of child poverty
How Would an Appreciation of the Yuan Affect the People's Republic of China’s Surplus in Processing Trade?
Enormous trade surpluses are problematic for the People's Republic of China (PRC) and the rest of the world. They primarily stem from processing trade. This paper investigates how exchange rate changes would affect the PRC's imports for processing and processed exports. The results indicate that an appreciation throughout East Asian supply chain countries would reduce the PRC's surplus in processing trade, while an appreciation of the yuan alone might not. Even for an appreciation throughout East Asia, however, the sum of the exchange rate elasticities is not large. Thus, to rebalance the PRC's trade, exchange rate appreciations must be accompanied by other changes such as factor market liberalization and greater enforcement of environmental regulations
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