Is Traditional Teaching really all that Bad? A Within-Student Between-Subject Approach

Recent studies conclude that teachers are important for student learning but it remains uncertain what actually determines effective teaching. This study directly peers into the black box of educational production by investigating the relationship between lecture style teaching and student achievement. Based on matched student-teacher data for the US, the estimation strategy exploits between-subject variation to control for unobserved student traits. Results indicate that traditional lecture style teaching is associated with significantly higher student achievement. No support for detrimental effects of lecture style teaching can be found even when evaluating possible selection biases due to unobservable teacher characteristics.teaching practices, educational production, TIMSS, between-subject variation

Effects of Adult Education Vouchers on the Labor Market: Evidence from a Randomized Field Experiment

Lifelong learning is often promoted in ageing societies, but little is known about its returns or governments’ ability to advance it. This paper evaluates the effects of a large-scale randomized field experiment issuing vouchers for adult education in Switzerland. We find no significant average effects of voucher-induced adult education on earnings, employment, and subsequent education one year after treatment. But effects are heterogeneous: Low-education individuals are most likely to profit from adult education, but least likely to use the voucher. The findings cast doubt on the effectiveness of existing untargeted voucher programs in promoting labor market outcomes through adult education.field experiment, voucher, adult education, LATE, Switzerland

Is traditional teaching really all that bad? : a within-student between-subject approach

Recent studies conclude that teachers are important for student learning but it remains uncertain what actually determines effective teaching. This study directly peers into the black box of educational production by investigating the relationship between lecture style teaching and student achievement. Based on matched student-teacher data for the US, the estimation strategy exploits between-subject variation to control for unobserved student traits. Results indicate that traditional lecture style teaching is associated with significantly higher student achievement. No support for detrimental effects of lecture style teaching can be found even when evaluating possible selection biases due to unobservable teacher characteristics

Labor Market Effects of Adult Education Vouchers: Evidence from a Randomized Field Experiment

Lifelong learning becomes increasingly important in times of population ageing, but little is known about the returns to adult education or the effectiveness of government attempts to promote adult learning. This paper evaluates the effects of a large-scale randomized field experiment with vouchers for adult education. We find no significant average labor market effects of voucher-induced self-financed adult education for compliers, but also find evidence for substantial effect heterogeneity. Overall, these findings cast doubts on the effectiveness of existing, unrestricted voucher programs to promote adult education

Effects of adult education vouchers on the labor market: Evidence from a randomized field experiment

Lifelong learning is often promoted in ageing societies, but little is known about its returns or governments' ability to advance it. This paper evaluates the effects of a large-scale randomized field experiment issuing vouchers for adult education in Switzerland. We find no significant average effects of voucher-induced adult education on earnings, employment, and subsequent education one year after treatment. But effects are heterogeneous: Low-education individuals are most likely to profit from adult education, but least likely to use the voucher. The findings cast doubt on the effectiveness of existing untargeted voucher programs in promoting labor market outcomes through adult education

Effects of adult education vouchers on the labor market: Evidence from a randomized field experiment

Lifelong learning is often promoted in ageing societies, but little is known about its returns or governments' ability to advance it. This paper evaluates the effects of a large-scale randomized field experiment issuing vouchers for adult education in Switzerland. We find no significant average effects of voucher-induced adult education on earnings, employment, and subsequent education one year after treatment. But effects are heterogeneous: Low- education individuals are most likely to profit from adult education, but least likely to use the voucher. The findings cast doubt on the effectiveness of existing untargeted voucher programs in promoting labor market outcomes through adult education

Ecología trófica del pejerrey (<i>Odontotesthes bonariensis</i>) en la laguna del Venado y Alsina, dos ambientes del sistema Encadenadas del Oeste, prov. de Buenos Aires

The aim of the present study was to analyze the feeding of the silverside Odontesthes bonariensis in the Venado and Alsina lake. which are part of the Encadenadas del Oeste lake system. The stomach content of 206 individuals was analyzed. Total length ranged from 93 to 585 mm. The vacuity index (VI) and repletion index (RI) were estimated by season and site. Index of Relative Importance (IRI) for each food category and the trophic level (TL) of pejerrey were calculated by site. The diet of the silverside was composed of 68 prey items, most of which were occasional preys. Copepods and cladocerans were the main prey items in the diet in both lagoons. Copepods were the most important item in Venado lagoon and cladocerans were so in Alsina lagoon. The micro crustaceans were the main prey item for both size classes, however their %IRI decreased in the larger fish (95% IRI for the 93-299 mm Tl size class and 63% IRI for the 300-585 mm Tl size class). Silverside TL estimated for each lagoon (TL= 3) characterizes it as secondary consumer.Facultad de Ciencias Naturales y Muse

Resultado de diferentes medidas de manejo tendientes a optimizar la pesquería de pejerrey (Odontesthes bonariensis) en la laguna Cochicó, Argentina

The Cochicó shallow lake is part of the Encadenadas del Oeste system (Buenos Aires province, Argentina). Since 2000, the municipal state has been conducting intensive tasks to supplement silverside (Odontesthes bonariensis) fisheries stock by seeding and furtive fishing control, as part of the strategy to improve and protect the resource, in order to achieve a progressive increase of the silverside stock and quality. The aim of this study was to evaluate the silverside population of the Cochicó shallow lake and, consequently, the management policies that are being implemented on this resource. Sampling was performed on a three-month basis, from April 2007 to March 2008, using gillnets and a trawl net. The relative abundance in number was estimated with gillnet capture. Catch per unit effort (CPUE) in weight was calculated considering the fishing night as the unit effort. The size structure of the dominant species was described and the proportional stock density index (PSD) was calculated. Odontesthes bonariensis was the dominant species, with a relative abundance of more than 92%. The mean CPUE was 201.6 kg/night. This value was higher than that found in previous years (19 to 120 kg/night) using the same methodology. The dominant size ranges were 25-27 and 29-31 cm total length (Lt). The PSD were 71% and 40% for sizes with potential recreational and commercial fishing harvest, respectively. The current quality and abundance of this fishing resource is essential for the Cochicó shallow lake and is the reason why it has emerged as one of the most prestigious silverside recreational fisheries locations in Argentina.Instituto de Limnología "Raúl A. Ringuelet