Strange and multi-strange particle production at the LHC energies with ALICE

Strange quark and particle production is studied at the LHC with unprecedented high beam energies in both heavy-ion and proton-proton collisions: on the one hand, strangeness is used for investigating chemical equilibration and bulk properties; on the other hand, strange particles contribute to probe different kinematical domains, from the one where collective phenomena are at play up to the region dominated by pQCD-calculable processes. We highlight the suitability of the ALICE experiment for this topic, presenting our latest measurements and comparing them to models.Comment: 8 pages, proceedings of Strangeness in Quark Matter 2011 conference (18-24 September 2011, Cracow

Demographic structure and capital accumulation

This paper develops an overlapping-generations (OLG) model to analyze the consequences of demographic structure changes induced by an exogenous shift in the birth rate.We first show that a finite growth rate of the population that maximizes long-run capital per capita exists. Then, we examine the theoretical properties of this growth rate by showing that: (i) it corresponds to the demographic structure such that the average ages of capital holders and workers are equal; (ii) it is associated to an efficient steady state; (iii) it increases with compulsory transfers from younger to older generations. Finally, we explain why standard OLG models do not exhibit such a growth rate.Continuous-time overlapping-generations models; Population aging

The nature and dynamics of poverty determinants in Burkina Faso in the 1990s

The author investigates the determinants and dynamics of poverty during the five-year growth period that followed the 1994 CFA franc devaluation in Burkina Faso. Results show that the nature and dynamics of poverty determinants are influenced by the spatial location of households and that the post-devaluation growth period did not significantly alter the pattern of poverty determinants. The most significant determinants of poverty over the growth period include the burden of age dependency, human and physical assets, household amenities, and spatial location. Though consistently significant at the national level, the direction of association between these determinants and welfare depends on their nature. While the burden of age dependency is consistently negatively associated with welfare, asset ownership is positively associated. The probability of being poor declines with increasing share of household assets and increases with the burden of age dependency. There are some variations at the regional level, however, shown by the difference in the scope of significance of these determinants. While the ratio of age dependency remains the most significant determinant of rural poverty, its explanatory power decreases considerably inurban areas where its marginal effect on the probability of being poor is relatively low over the two reference periods, despite the significance of the probit coefficient and the relatively low asymptotic standard error.Health Economics&Finance,Environmental Economics&Policies,Services&Transfers to Poor,Public Health Promotion,Health Systems Development&Reform,Poverty Assessment,Achieving Shared Growth,Environmental Economics&Policies,Health Economics&Finance,Poverty Reduction Strategies

Fiscal adjustment and growth in Sub-Saharan Africa : overview and lessons from the current downturn

In light of the proliferation of exceptionally large fiscal stimuli to ward off the recession triggered by the 2008 global economic and financial crisis in most advanced economies, this paper revisits the fiscal adjustment and growth nexus in Sub-Saharan Africa. Using transfer functions, it quantifies expected losses in terms of aggregate output largely attributed to a systematic implementation of pro-cyclical expenditure switching and reducing policies to achieve low deficit targets throughout the decades ofadjustments. The results consistently highlight a much higher predicted aggregate output under the hypothesized counter-cyclical fiscal expansion option. This consistent outcome suggests that the output gap would have been significantly smaller in the region if countries had drawn on stop-and-go policies of fiscal expansion to sustainably raise the stock of capital investments.Debt Markets,Public Sector Expenditure Policy,Fiscal Adjustment,Economic Stabilization,Economic Theory&Research

Africa and Arab Gulf states : divergent development paths and prospects for convergence

In spite of the similarities between Sub-Saharan Africa and the Arab Gulf region (Gulf Cooperation Council states), development policies implemented in these two regions of the world have produced markedly different and even divergent outcomes. While Gulf Cooperation Council states have drawn on hydrocarbon revenues to dramatically transform their economic landscape, Sub-Saharan African countries have exhibited abysmal economic and social outcomes. The remarkable increase in personal income and large current account surpluses in Arab Gulf states is in sharp contrast with widespread poverty and recurrent balance of payments crises in Sub-Saharan Africa. This paper reviews the possible causes of these divergent development paths and discusses the prospects for economic convergence in the new globalization landscape of growing trade ties between the two regions. In particular, it shows that development models underpinned by institutional continuity and intergenerational accountability could enhance long-run growth in Sub-Saharan Africa and income convergence between the two regions.Economic Theory&Research,Emerging Markets,Currencies and Exchange Rates,Debt Markets,

Determinants of globalization and growth prospects for Sub-Saharan African countries

Over the decades leading to the global financial crisis, the world witnessed a deepening integration of world economies, irrespective of a country’s geographical location on the spherical space. This process of increasing interdependence of world economies, most notably illustrated by the scale of financial flows and movements of goods and services now termed globalization, has been facilitated by research and development and advances in technology, especially in the area of information and communication technology. In spite of its global nature, its expected benefits have not been uniformly distributed, however. This paper shows that the countries and regions that are driving the process of knowledge creation and production of high-tech and manufactured goods, building on frontier technology, are benefiting the most from globalization, increasingly acting as drivers and relegating Sub-Saharan Africa to the end-user status. In this process, the income gap between Sub-Saharan Africa and the globalizers has increased even more. However, the paper also shows that raising the level of technological endowment in Sub-Saharan Africa to that of developed countries could go a long way to bridge Africa's output gaps and improve its export performance in the new globalization landscape of the post-financial crisis era.Debt Markets,Emerging Markets,Economic Theory&Research,Currencies and Exchange Rates,

Conflicts and returns to stability in developing countries : a comparative analysis

Sub-Saharan Africa's dismal development outcomes -- growth collapse and declining real income -- are often used to highlight its sharp development contrast with other regions of the developing world. Drawing on a large cross-section analysis, this paper shows that Africa's underlying dismal records can also be largely accounted for by the skewed distribution of growth in the post-independence era. In particular, structurally low investment rates in a context of high political risk and uncertainty undermined growth prospects in the region. However, counterfactual simulations based on a variation of neoclassical growth models and under the hypothetical equalization of political risk profile alternative result in large economic returns, reflected in the significantly higher level of aggregate output and income in the subset of conflict-affected countries. Income gets even higher when the hypothetical reduction of political risks alternative is accompanied by sustained increases in capital accumulation.Economic Theory&Research,Post Conflict Reconstruction,Achieving Shared Growth,Emerging Markets,Debt Markets

Causality between external debt and capital flight in Sub-Saharan Africa

Over the past few decades, the foreign liabilities of the majority of countries in Sub-Saharan Africa have grown dramatically, propelling most nations into the status of Highly Indebted Poor Countries, when these liabilities reached unsustainable levels in the 1990s. At the same time, increases in capital flight from the region followed a parallel trend, leading scholars to draw on"revolving door"models to explain the apparent positive covariation of external debt and capital flight in the region. This paper investigates the causality between external debt and capital flight in a cross-section of Sub-Saharan African countries using co-integration and error-correction models. Although dual causality, which is consistent with the revolving door hypothesis, cannot be rejected for the majority of countries, empirical evidence highlights the lead of external debt over capital flight. The significance of error-correction terms points to a long-run co-integrating relationship between external debt and capital flight in a large number of countries.Economic Theory&Research,External Debt,Debt Markets,Deposit Insurance,Currencies and Exchange Rates

Technology trap and poverty trap in Sub-Saharan Africa

Since the industrial revolution, advances in science and technology have continuously accounted for most of the growth and wealth accumulation in leading industrialized economies. In recent years, the contribution of technological progress to growth and welfare improvement has increased even further, especially with the globalization process which has been characterized by exponential growth in exports of manufactured goods. This paper establishes the existence of a technology trap in Sub-Saharan Africa. It shows that the widening income and welfare gap between Sub-Saharan Africa and the rest of world is largely accounted for by the technology trap responsible for the poverty trap. This result is supported by empirical evidence which suggests that if countries in Sub-Saharan Africa were using the same level of technology enjoyed by industrialized countries income levels in Sub-Saharan Africa would be significantly higher. The result is robust, even after controlling for institutional, macroeconomic instability and volatility factors. Consistent with standard one-sector neoclassical growth models, this suggests that uniform convergence to a worldwide technology frontier may lead to income convergence in the spherical space. Overcoming the technology trap in Sub-Saharan Africa may therefore be essential to achieving the Millennium Development Goals and evolving toward global convergence in the process of economic development.Technology Industry,Economic Theory&Research,Achieving Shared Growth,ICT Policy and Strategies,E-Business