The Promise of Workplace Training for Non-College-Bound Youth: Theory and Evidence from German Apprenticeship

This paper assesses the potential of `workplace training' with reference to German Apprenticeship. When occupational matching is important, we derive conditions under which firms provide `optimal' training packages. Since the German system broadly meets these conditions, we evaluate the effectiveness of apprenticeship using a large administrative dataset. We find returns to apprenticeship for even the lowest ability school-leavers comparable to standard estimates of the return to school, and show that training is transferable across a wide range of occupations. We conclude that the positive experience with German Apprenticeship Training may guide the design of similar policies in other countries.

The Promise of Workplace Training for Non-College Bound Youth: Theory and Evidence from German Apprenticeship

This paper assesses the potential of `workplace training' with reference to German Apprenticeship. When occupational matching is important, we derive conditions under which firms provide `optimal' training packages. Since the German system broadly meets these conditions, we evaluate the effectiveness of apprenticeship using a large administrative dataset. We find returns to apprenticeship for even the lowest ability school-leavers comparable to standard estimates of the return to school, and show that training is transferable across a wide range of occupations, such as a one-digit occupation group. We conclude that the positive experience with German Apprenticeship Training may guide the design of similar policies in other countries.German Apprenticeship Training, Human Capital, Occupational Mobility, Wages.

Matching, Screening and Firm Investment in General Training: Theory and Evidence

When job matching is important, we show that firms will pay for general training under very weak conditions. The key ingredient in our model is the idea that it is more costly to screen skilled workers than it is to screen unskilled ones. In equilibrium, this 'softens' competition for trained workers, allowing firms to recoup training investments. We apply our model to a classic case of firm investment in general training - German Apprenticeship Training - and show that a key prediction of our model that is not shared by other models is strongly supported in the data.General Training; Human Capital; Auctions; Wages

The Effect of Education on Adult Health and Mortality: Evidence from Britain

There is a strong, positive and well-documented correlation between education and health outcomes. There is much less evidence on the extent to which this correlation reflects the causal effect of education on health - the parameter of interest for policy. In this paper we attempt to overcome the difficulties associated with estimating the causal effect of education on health. Our approach exploits two changes to British compulsory schooling laws that generated sharp differences in educational attainment among individuals born just months apart. Using regression discontinuity methods, we confirm that the cohorts just affected by these changes completed significantly more education than slightly older cohorts subject to the old laws. However, we find little evidence that this additional education improved health outcomes or changed health behaviors. We argue that it is hard to attribute these findings to the content of the additional education or the wider circumstances that the affected cohorts faced (e.g., universal health insurance). As such, our results suggest caution as to the likely health returns to educational interventions focused on increasing educational attainment among those at risk of dropping out of high school, a target of recent health policy efforts.

Education and the Age Profile of Literacy into Adulthood

American teenagers perform considerably worse on international assessments of achievement than do teenagers in other high-income countries. This observation has been a source of great concern since the first international tests were administered in the 1960s. But does this skill gap persist into adulthood? We examine this question using the first international assessment of adult literacy, conducted in the 1990s. We find that, consistent with other assessments of the school-age population, U.S. teenagers perform relatively poorly, ranking behind teenagers in the twelve other rich countries surveyed. However, by their late twenties, Americans compare much more favorably to their counterparts abroad: U.S. adults aged 26-30 assessed at the same time using the same test ranked seventh in the same group of countries, and the gap with countries still ahead was much diminished. The historical advantage that the United States has enjoyed in college graduation appears to be an important reason why, between the teen years and the late twenties, American literacy rates appear to catch up with those in other high-income countries. The educational systems of countries with high university graduation rates appear to share two features: comprehensive secondary schools -- in which all students have the option of taking courses to prepare for university -- and a highly accessible university sector. For most of the twentieth century, the United States led the developed world in participation and completion of higher education. In recent years, however, other high-income countries -- many of which established comprehensive secondary schooling in decades prior -- have substantially expanded access to university education. These changes should have striking consequences for the distribution of skill across countries in the years to come

The Long-Run Effects of Attending an Elite School: Evidence from the United Kingdom

This paper estimates the impact of elite school attendance on long-run outcomes including completed education, income, and fertility. Our data consist of individuals born in the 1950s and educated in a UK district that assigned students to either elite or non-elite secondary schools. Using instrumental variables methods that exploit the school assignment formula, we find that elite school attendance had large impacts on completed education. Surprisingly, there are no significant effects on most labor market outcomes except for an increase in female income. By contrast, we document a large and significant negative impact on female fertility

Dynamical Adaptation in Photoreceptors

Adaptation is at the heart of sensation and nowhere is it more salient than in early visual processing. Light adaptation in photoreceptors is doubly dynamical: it depends upon the temporal structure of the input and it affects the temporal structure of the response. We introduce a non-linear dynamical adaptation model of photoreceptors. It is simple enough that it can be solved exactly and simulated with ease; analytical and numerical approaches combined provide both intuition on the behavior of dynamical adaptation and quantitative results to be compared with data. Yet the model is rich enough to capture intricate phenomenology. First, we show that it reproduces the known phenomenology of light response and short-term adaptation. Second, we present new recordings and demonstrate that the model reproduces cone response with great precision. Third, we derive a number of predictions on the response of photoreceptors to sophisticated stimuli such as periodic inputs, various forms of flickering inputs, and natural inputs. In particular, we demonstrate that photoreceptors undergo rapid adaptation of response gain and time scale, over ∼ 300 ms—i. e., over the time scale of the response itself—and we confirm this prediction with data. For natural inputs, this fast adaptation can modulate the response gain more than tenfold and is hence physiologically relevant

Nonlinear circuits for naturalistic visual motion estimation

Many animals use visual signals to estimate motion. Canonical models suppose that animals estimate motion by cross-correlating pairs of spatiotemporally separated visual signals, but recent experiments indicate that humans and flies perceive motion from higher-order correlations that signify motion in natural environments. Here we show how biologically plausible processing motifs in neural circuits could be tuned to extract this information. We emphasize how known aspects of Drosophila's visual circuitry could embody this tuning and predict fly behavior. We find that segregating motion signals into ON/OFF channels can enhance estimation accuracy by accounting for natural light/dark asymmetries. Furthermore, a diversity of inputs to motion detecting neurons can provide access to more complex higher-order correlations. Collectively, these results illustrate how non-canonical computations improve motion estimation with naturalistic inputs. This argues that the complexity of the fly's motion computations, implemented in its elaborate circuits, represents a valuable feature of its visual motion estimator. DOI: http://dx.doi.org/10.7554/eLife.09123.00

The role of the AFD neuron in C. elegans thermotaxis analyzed using femtosecond laser ablation

BACKGROUND: Caenorhabditis elegans actively crawls down thermal gradients until it reaches the temperature of its prior cultivation, exhibiting what is called cryophilic movement. Implicit in the worm's performance of cryophilic movement is the ability to detect thermal gradients, and implicit in regulating the performance of cryophilic movement is the ability to compare the current temperature of its surroundings with a stored memory of its cultivation temperature. Several lines of evidence link the AFD sensory neuron to thermotactic behavior, but its precise role is unclear. A current model contends that AFD is part of a thermophilic mechanism for biasing the worm's movement up gradients that counterbalances the cryophilic mechanism for biasing its movement down gradients. RESULTS: We used tightly-focused femtosecond laser pulses to dissect the AFD neuronal cell bodies and the AFD sensory dendrites in C. elegans to investigate their contribution to cryophilic movement. We establish that femtosecond laser ablation can exhibit submicrometer precision, severing individual sensory dendrites without causing collateral damage. We show that severing the dendrites of sensory neurons in young adult worms permanently abolishes their sensory contribution without functional regeneration. We show that the AFD neuron regulates a mechanism for generating cryophilic bias, but we find no evidence that AFD laser surgery reduces a putative ability to generate thermophilic bias. In addition, although disruption of the AIY interneuron causes worms to exhibit cryophilic bias at all temperatures, we find no evidence that laser killing the AIZ interneuron causes thermophilic bias at any temperature. CONCLUSION: We conclude that laser surgical analysis of the neural circuit for thermotaxis does not support a model in which AFD opposes cryophilic bias by generating thermophilic bias. Our data supports a model in which the AFD neuron gates a mechanism for generating cryophilic bias