Objective: To estimate the causal effect of breastfeeding on children's cognitive skills as measured at ages 3, 5, 7 and 11. Design: An instrumental variable (IV) strategy which provides a correction method for dealing with selection bias. Standard linear regression models are compared to...

This paper estimates the relationship between handedness and social adjustment. In addition to binary measures of hand preference, we also use a continuous measure of hand skill. Outcomes at ages 7, 11 and 16 are studied. Using a semi-parametric estimator it is shown that non-righthandedness (as...

There is a well established socioeconomic gradient in educational attainment, despite much effort in recent decades to address this inequality. This study evaluates a university access program that provides financial, academic and social support to low socioeconomic status (SES) students using a...

This paper estimates the marginal effect of class size on educational attainment of high school students. We control for the potential endogeneity of class size in two ways using a conventional instrumental variable approach, based on changes in cohort size, and an alternative method where...

Given the huge size, relatively speaking, of the human influx into Ireland over the past decade or so, the evolution of Irish attitudes to immigration is of more than parochial interest. In this paper we use the six rounds of the European Social Survey (2002-2012) in seeking to account for those...

The Great Recession has renewed interest in whether and how health responds to macroeconomic changes. Ireland provides a convenient natural experiment to examine this since a period of sustained high growth and low unemployment - the so-called Celtic Tiger period - gave way to a deep recession...

This paper analyses levels of low literacy across twelve countries using the International Adult Literacy Survey. We go beyond existing work that only looks at the proportions below certain critical levels of literacy. Using methods developed for the measurement of poverty we calculate measures...

This paper uses the General Household Survey data for the UK to study earnings discrimination between natives and migrants. The key result is that the main source of discrimination is ethnicity rather than migrant status per se. This paper differs from the conventional focus in studies of...