When subjects learn to associate two sample durations with two comparison keys, do they learn to associate the keys with the short and long samples (relational hypothesis), or with the specific sample durations (absolute hypothesis)? We exposed 16 pigeons to an ABA design in which phases A and B corresponded to tasks using samples of 1s and 4 s, or 4 s and 16 s. Across phases, we varied the mapping between the samples and the keys. For group Relative, short and long samples were always associated with the same keys (e.g., Phase A: ‘1s--> Left, 4 s--> Right’; Phase B: ‘4 s--> Left, 16 s--> Right’); for group Absolute, the 4-s sample was associated always with the same key (e.g., Phase A: ‘1s--> Left, 4 s--> Right’; Phase B: ’16 s--> Left, 4 s--> Right”). If temporal control is relational, group Relative should learn the new task faster than group Absolute, but if temporal control is absolute, the opposite should occur. We compared the results with the predictions of the Learning-to-Time (LeT) model, which accounts for temporal discrimination in terms of absolute stimulus control and stimulus generalization. The acquisition curves of the two groups were generally consistent with LeT and therefore more consistent with the absolute than the relative hypothesis.

This study examined the predictive validity of accelerometers (ACC) to estimate physical activity intensity (PAI) across age and differences in intensity predictions when expressed in relative and absolute PAI terms. Ninety adults categorized into 3 age groups (20–29, 40–49, and 60–69 yr) completed a treadmill calibration study with simultaneous ACC (7164 Actigraph) and oxygen-consumption assessment. Results revealed strong linear relations between ACC output and measured PAI (R2 = .62–.89) across age and similar ACC cut-point ranges across age delineating absolute PAI ranges compared with previous findings. Comparing measured metabolic equivalents (METs) with estimated METs derived from previously published regression equations revealed that age did not affect predictive validity of ACC estimates of absolute PAI. Comparing ACC output expressed in relative vs. absolute terms across age revealed substantial differences in PAI ACC count ranges. Further work is warranted to increase the applicability of ACC use relative to PAI differences associated with physiological changes with age.

Measurement of the middle class has recently come to the center of policy debate in middle-income countries as they search for the potential engines of growth and good governance. This debate assumes, first, that there is a meaningful definition of class, and second, that thresholds that define relatively homogeneous groups in terms of pre-determined sociological characteristics can be found empirically. This paper aims at proposing a view of the middle class based on vulnerability to poverty. Following this approach the paper exploits panel data to determine the amount of comparable income -- associated with a low probability of falling into poverty -- which could define the lower bound of the middle class. The paper looks at absolute thresholds, challenging the view that people above the poverty line are actually part of the middle class. The estimated lower threshold is used in cross-section surveys to quantify the size and the evolution of middle classes in Chile, Mexico, and Peru over the past two decades. The first relevant feature relates to the fact that the proposed thresholds lie around the 60th percentile of the distribution. The evidence also shows that the middle class has increased significantly in all three countries...

The authors report new estimates of measures of absolute poverty for the developing world over 1981-2004. A clear trend decline in the percentage of people who are absolutely poor is evident, although with uneven progress across regions. They find more mixed success in reducing the total number of poor. Indeed, the developing world outside China has seen little or no sustained progress in reducing the number of poor, with rising poverty counts in some regions, notably Sub-Saharan Africa. There are encouraging signs of progress in reducing the incidence of poverty in all regions after 2000, although it is too early to say if this is a new trend.

The rapid economic growth since 2000 has been the main driver of poverty reduction in Romania. However, even under the current positive growth scenario, there are still people who live in poverty, and some who are unlikely to benefit from future growth and thus may continue to be left behind. For these people an effective redistributive social policy and targeted interventions are needed. The purpose of this note is to assist the Ministry of Labor, Family and Equal Opportunities (MLFEO) to analyze and monitor the effectiveness of the main social safety net benefits to fight social exclusion and reduce poverty. To determine the extent to which social transfers offer protection to the poorest groups of the population, the paper uses the last available (2004-2006) rounds of the household budget survey data. The analysis presented here uses the consumption aggregate and the absolute poverty definition presented in the 2003 and 2007 poverty assessments. Three main indicators are used to assess the effectiveness of social protection (SP) programs: coverage (share of population covered by the programs)...

The objective of this report is to contribute towards institutional capacity building for regular monitoring and analysis of poverty, as well as other indicators of living conditions and social inclusion. This report analyzes the poverty trends and profile using the national absolute poverty line, which measures changes in the level of welfare and allows for a more straightforward interpretation of comparisons over time. Chapter 1 presents an overview of poverty dynamics using both relative and absolute measures of poverty, and explores the reasons for the observed difference in trends between the two measures. Chapter 2 investigates the relationship between economic growth, inequality and poverty in Romania during the period 1995 and 2006.

The paper examines the ways in which recent economic growth has been uneven in China and India and what this has meant for inequality and poverty. Drawing on analyses based on existing household survey data and aggregate data from official sources, the authors show that growth has indeed been uneven-geographically, sectorally, and at the household level-and that this has meant uneven progress against poverty, less poverty reduction than might have been achieved had growth been more balanced, and an increase in income inequality. The paper then examines why growth was uneven and why this should be of concern. The discussion is structured around the idea that there are both "good" and "bad" inequalities-drivers and dimensions of inequality and uneven growth that are good or bad in terms of what they imply for both equity and long-term growth and development. The authors argue that the development paths of both China and India have been influenced by, and have generated, both types of inequalities and that while good inequalities-most notably those that reflect the role of economic incentives-have been critical to the growth experience thus far, there is a risk that bad inequalities-those that prevent individuals from connecting to markets and limit investment and accumulation of human capital and physical capital-may undermine the sustainability of growth in the coming years. The authors argue that policies are needed that preserve the good inequalities-continued incentives for innovation and investment-but reduce the scope for bad ones...

External shocks, such as commodity price fluctuations, natural disasters, and the role of the international economy, are often blamed for the poor economic performance of low-income countries. The author quantifies the impact of these different external shocks using a panel vector autoregression (VAR) approach and compares their relative contributions to output volatility in low-income countries vis-à-vis internal factors. He finds that external shocks can only explain a small fraction of the output variance of a typical low-income country. Internal factors are the main source of fluctuations. From a quantitative perspective, the output effect of external shocks is typically small in absolute terms, but significant relative to the historic performance of these countries.

Relative deprivation, shame and social exclusion can matter to the welfare of people everywhere. The authors argue that such social effects on welfare call for a reconsideration of how we assess global poverty, but they do not support standard measures of relative poverty. The paper argues instead for using a weakly-relative measure as the upper-bound complement to the lower-bound provided by a standard absolute measure. New estimates of global poverty are presented, drawing on 850 household surveys spanning 125 countries over 1981-2008. The absolute line is $1.25 a day at 2005 prices, while the relative line rises with the mean, at a gradient of 1:2 above $1.25 a day. The authors show that these parameter choices are consistent with cross-country data on national poverty lines. The results indicate that the incidence of both absolute and weakly-relative poverty in the developing world has been falling since the 1990s, but more slowly for the relative measure. While the number of absolutely poor has fallen, the number of relatively poor has changed little since the 1990s...

New data derived directly from household surveys are used to examine the effects of globalization on income distribution in poor and rich countries. The article looks at the impact of openness and of direct foreign investment on relative income shares across the entire income distribution. It finds strong evidence that at low average income levels, the income share of the poor is smaller in countries that are more open to trade. As national income levels rise, the incomes of the poor and the middle class rise relative to the income of the rich. The article explains why using the trade to gross domestic product (GDP) ratio in purchasing power parity terms, as favored by some analysts, is inappropriate in studies of the effect of trade on income distribution.

In the last year or so, markedly different claims have been heard within the development community about just how much progress is being made against poverty and inequality in the current period of "globalization." Ravallion provides a nontechnical overview of the conceptual and methodological issues underlying these conflicting claims. He argues that the dramatically differing positions taken in this debate often stem from differences in the concepts and definitions used and differences in data sources and measurement assumptions. These differences are often hidden from view in the debate, but they need to be considered carefully if one is to properly interpret the evidence. The author argues that the best available evidence suggests that if the rate of progress against absolute poverty in the developing world in the 1990s is maintained, then the Millennium Development Goal of halving the 1990 aggregate poverty rate by 2015 will be achieved on time in the aggregate, though not in all regions. He concludes with some observations on the implications for the more policy-oriented debates on globalization and pro-poor growth.

Ukraine recorded one of the sharpest declines in poverty of any transition economy in recent years. The poverty rate, measured against an absolute poverty line, fell from a high of 32 percent in 2001 to 14 percent in 2004, and then again to 8 percent in 2005. This Update presents simulations of the direct influence of an increase in energy prices on the poverty rate. Using 2005 as a base period, the simulations estimate the poverty rates that might result from alternative increases in the price of energy. In this simple model, the main determinant of the impact of the increase in energy prices on poverty is the share of energy in total household expenditures. An increase in energy prices will harm the poor slightly more than the rich because the poor have a slightly higher share of energy in their expenditures.

This paper looks at differential progress on the health Millennium Development Goals between the poor and better-off within countries. The findings are based on original analysis of 235 Demographic and Health Surveys and Multiple Indicator Cluster Surveys, spanning 64 developing countries over the period 1990-2011. Five health status indicators and seven intervention indicators are tracked for all the health Millennium Development Goals. In most countries, the poorest 40 percent have made faster progress than the richest 60 percent. On average, relative inequality in the Millennium Development Goal indicators has been falling. However, the opposite is true in a sizable minority of countries, especially on child health status indicators (40-50 percent in the cases of child malnutrition and mortality), and on some intervention indicators (almost 40 percent in the case of immunizations). Absolute inequality has been rising in a larger fraction of countries and in around one-quarter of countries, the poorest 40 percent have been slipping backward in absolute terms. Despite reductions in most countries...

This note proposes a reform agenda to address the challenges facing the system of social assistance This will require: i) a progressive shift of public expenditure toward pro-poor programs; ii) improving coherence and complementarity among social protection programs, and iii) making social assistance programs more inclusive and responsive. The structure of this chapter is as follows. The next two sections provide an overview of poverty and the composition and trends in non-contributory social protection expenditure in the Kyrgyz Republic. The fourth section looks at performance of the social assistance expenditure in the Kyrgyz Republic and shows that while spending has increased significantly in recent years, its performance in terms of coverage and targeting of the poor, as well as in terms of its impact on poverty remains modest. Other issues, which are important to take into account in the process of improving effectiveness of social assistance expenditure, are discussed in the following section. The last section concludes by summarizing key challenges and proposing recommendations for system reform...

This note describes the trends in, and composition of, absolute poverty based on household expenditures, and is thus concerned, as a matter of policy objectives, with access of the population to a particular minimum standard of living. This should be viewed as complementary to the companion note on social exclusion based on Europe 2020 indicators including the relative at-risk-of-poverty (AROP) rate, focuses on low income in relation to other residents in a given country. In addition to the analysis of absolute poverty, the note also presents an analysis of inclusive growth, aimed at assessing whether income growth (losses) benefit (impact) differentially the lowest part (here, bottom forty percent) of the distribution. Other approaches, such as those including measures of poverty based on current income, or self-reported measures of affordability, or approached that differ in the way they set the poverty threshold exist. The choice of World Bank’s methodology for purposes of this report is primarily on pragmatic grounds: (i) it allows for the analysis of trends during 2007-2011; (ii) the same methodology was adopted in the previous report (World Bank 2009) to analyze poverty trends during 2004-2007...

A translation from the beginning of Walter Burley's (or Burleigh's) De suppositionibus, as edited in Stephen F. Brown, "Walter Burleigh's Treatise De suppositionibus and Its Influence on William of Ockham," Franciscan Studies 32 (1972), pp. 15-64. The translation consists of everything up through the discussion of the supposition of "absolute" terms, but omits the discussion of the supposition of "relative" terms and everything after that. (This amounts to Brown, pp. 31-43, paragraphs (1.1)-(2.425).)

In this paper the authors analyze the evolution and the determinants of in-work poverty in Poland, according to three poverty lines: relative, absolute, and the 1998-adjusted poverty line. The authors find that behind moderately high in-work poverty incidence in Poland there is very high in-work poverty in agriculture and modest in-work poverty in all other sectors. Workers are much less likely to be poor than jobless individuals, especially the unemployed. In fact, the share of adults out of employment is a much stronger predictor of households' risk of poverty than the level of wages at which they work. Moreover, the share of jobless adults or of agricultural workers has become an increasing determinant of in-work poverty over time. The risk of in-work poverty is also inversely related to the educational attainment and the stability of employment of an individual, which is especially important considering that the incidence of temporary contracts in Poland is the highest across both European Union (EU) and Organization of Economic Cooperation and Development (OECD) countries. Existing fiscal and benefit policies have not been sufficient to address in-work poverty and some of its underlying causes in the labor market: the author presents four policy recommendations aimed at tackling in-work and total poverty...

China's progress in poverty reduction over the last 25 years is enviable. One cannot fail to be impressed by what this vast nation of 1.3 billion people has achieved in so little time. In terms of a wide range of indicators, the progress has been remarkable. Poverty in terms of income and consumption has been dramatically reduced. Progress has also been substantial in terms of human development indicators. Most of the millennium development goals have either already been achieved or the country is well on the way to achieving them. As a result of this progress, the country is now at a very different stage of development than it was at the dawn of the economic reforms at the beginning of the 1980s. China's poverty reduction performance has been even more striking. Between 1981 and 2004, the fraction of the population consuming below this poverty line fell from 65 percent to 10 percent, and the absolute number of poor fell from 652 million to 135 million, a decline of over half a billion people. The most rapid declines in poverty...

China's progress in poverty reduction over the last 25 years is enviable. One cannot fail to be impressed by what this vast nation of 1.3 billion people has achieved in so little time. In terms of a wide range of indicators, the progress has been remarkable. Poverty in terms of income and consumption has been dramatically reduced. Progress has also been substantial in terms of human development indicators. Most of the millennium development goals have either already been achieved or the country is well on the way to achieving them. As a result of this progress, the country is now at a very different stage of development than it was at the dawn of the economic reforms at the beginning of the 1980s. China's poverty reduction performance has been even more striking. Between 1981 and 2004, the fraction of the population consuming below this poverty line fell from 65 percent to 10 percent, and the absolute number of poor fell from 652 million to 135 million, a decline of over half a billion people. The most rapid declines in poverty...

Despite the overall successful picture of sustained economic growth, a significant share of Romanians live in absolute poverty and deep pockets of poverty still remain, pointing to the need of more inclusive and effective social safety nets. During recent years Romania made efforts to redistribute the benefits of growth by keeping constant the share of GDP devoted to social protection; still, the per capita expenditure on the main social assistance benefits is amongst the lowest in EU. Compared with the EU average, Romania has a good mix of targeted/ non-targeted social assistance programs, but they provide only a modest protection of the poor against income vulnerability, and at a relatively high cost. Taken together, the safety net benefits cover 71 percent of the poor. Some key issues and challenges for Romania are: The 'leakages' of social assistance cash transfers has increased, while performance in covering the poverty gap weakened. Spending on poverty targeted programs has decreased relative to GDP and so has the capability of these benefits to adequately cover the basic needs of the poor. The high number of programs and the heterogeneity of the eligibility thresholds/criteria for different benefits translate into a rather fragmented and difficult to monitor system of social assistance benefits. The report describes several policy options or recommendations...