The third pillar in Europe: institutional factors and individual decisions

This paper studies and documents household participation in voluntary individual retirement accounts (IRAs) in eleven European countries. Using recently available, internationally comparable data of households aged 50+, we calculate country-by-country average marginal effects of the probability to save in IRAs. We link the evidence from the micro data to the institutional differences in pension systems that prevail across the countries in our sample. Our results indicate that households' participation in the 'third pillar' varies substantially across countries, both due to institutional differences and household characteristics. Higher education is crucial for participation in countries with shorter traditions of IRAs where awareness matters most. Background risk due to expectations of future pension reforms as well as experience with occupational pensions increase voluntary retirement savings additionally for the currently employed individuals in our sample. --individual retirement accounts,pension reform,consumption and saving over the life-cycle

A Framework for Analyzing Tariffs and Subsidies in Water Provision to Urban Households in Developing Countries

This paper aims to present a basic conceptual framework for understanding the main practical issues and challenges relating to tariffs and subsidies in the water sector in developing countries. The paper introduces the basic economic notions relevant to the water sector; presents an analytical framework for assessing the need for and evaluating subsidies; and discusses the recent evidence on the features and performance of water tariffs and subsidies in various regions, with a special focus on Africa. The discussion is limited to the provision of drinking water to urban households in developing countries.water, access to water, tariffs, subsidies, urban development

Estimating the Amount of a Global Feed-in Tariff for Renewable Electricity

We present a simple model to estimate the subsidy cost embedded in a global feed-in tariff (GFIT) to simultaneously stimulate electrification and the take-up of renewable energy sources for electricity generation in developing countries. The GFIT would subsidize developing countries for investments they make in generation capacity for renewable electricity up to a threshold level of electricity consumption per capita. Between 2010 and 2025, countries below this threshold strive to bridge the gap by 2025, when subsidies—based on the difference between the costs of renewable technologies and conventional energy sources-end.feed-in tariff, renewable energy, electrification, low-carbon development

Measuring the risk on housing investment in the informal sector: theory and evidence from Pune, India

The authors provide an economic framework to analyze investment in informal housing in developing countries. They consider a simple model of investment in the housing market where investors can choose between two sectors-the formal sector, where physical investment faces no risk of destruction, and the informal sector, where investment in each period is subjected to an exogenous risk of destruction. Construction costs differ between the two sectors. All households are renters. Renters shop for dwelling attributes and do not care about the sector (formal or informal) itself. The model implies that returns on investment, measured by the rent-to-value ration, will be higher in the informal sector. The authors use a survey conducted by the World Bank in Pune, India in 2002. The sample comprises 2,850 households. This survey had the peculiarity of asking the households, regardless of tenure status, questions about the market rent and value of their dwelling. Thus they can calculate individual rates of return for each unit without facing the typical selection bias problems. Comparing the distributions of returns in the informal and formal sectors, the authors obtain the following results: 1) Rates of return are significantly higher in the informal sector, as predicted by the model. 2) These figures imply a perceived risk on housing investment in the informal sector equivalent to an annual destruction rate ranging between 1 and 2 percent. 3) The two distributions of rates of return present highly idiosyncratic components and are not well explained by variables proxying either the strength of informal property rights or lower perceived risks of eviction.Legal Products,Banks&Banking Reform,Non Bank Financial Institutions,Poverty Assessment,Health Economics&Finance

Some variance reduction methods for numerical stochastic homogenization

We overview a series of recent works devoted to variance reduction techniques for numerical stochastic homogenization. Numerical homogenization requires solving a set of problems at the micro scale, the so-called corrector problems. In a random environment, these problems are stochastic and therefore need to be repeatedly solved, for several configurations of the medium considered. An empirical average over all configurations is then performed using the Monte-Carlo approach, so as to approximate the effective coefficients necessary to determine the macroscopic behavior. Variance severely affects the accuracy and the cost of such computations. Variance reduction approaches, borrowed from other contexts of the engineering sciences, can be useful. Some of these variance reduction techniques are presented, studied and tested here

A Shannon's theory of knowledge

Our so-called "Information Society", is gradually changing into a "Knowledge Society". The Shannons Theory provided a formal and mathematical framework for information. It was very fruitful for avoiding ambiguity on the concept of information. This paper proposes a transposition of this theory for knowledge. From the three axes of a formal model designed for knowledge engineering (information, sense and context), three quantitative measures are proposed to get a measure of the quantity of knowledge of a system. This notion permits to consider applications as the cognitive measure of a web site, a knowledge community (community of practice…).Knowledge, Knowledge management, Shannon's theory