WorldCat Identities

Huber, Martin

Overview
Works: 20 works in 42 publications in 2 languages and 100 library holdings
Roles: Author, Thesis advisor, Editor
Classifications: RD563, 330
Publication Timeline
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Most widely held works by Martin Huber
Does leaving welfare improve health? Evidence for Germany by Martin Huber( )
8 editions published in 2009 in English and held by 35 WorldCat member libraries worldwide
Using exceptionally rich linked administrative and survey information on German welfare recipients we investigate the health effects of transitions from welfare to employment and of assignments to welfare-to-work programmes. Applying semi-parametric propensity score matching estimators we find that employment substantially increases (mental) health. The positive effects are mainly driven by males and individuals with bad initial health conditions and are largest for males with poor health. In contrast, the effects of welfare-to-work programmes, including subsidized jobs, are ambiguous and statistically insignificant for most outcomes. Robustness checks that include a semi-parametric instrumental variable approach do not provide reasons for concern
Do German welfare to work programmes reduce welfare and increase work ( )
9 editions published in 2009 in English and held by 32 WorldCat member libraries worldwide
Many Western economies have reformed their welfare systems with the aim of activating welfare recipients by increasing welfare-to-work programmes and job search enforcement. We evaluate the three most important German welfare-to-work programmes implemented after a major reform in January 2005 ("Hartz IV"). Our analysis is based on a unique combination of large scale survey and administrative data that is unusually rich with respect to individual, household, agency level, and regional information. We use this richness to allow for a selection-on-observables approach when doing the econometric evaluation. We find that short-term training programmes on average increase their participants' employment perspectives and that all programmes induce further programme participation. We also show that there is considerable effect heterogeneity across different subgroups of participants that could be exploited to improve the allocation of welfare recipients to the specific programmes and thus increase overall programme effectiveness. -- Welfare-to-work policies ; propensity score matching ; programme evaluation ; panel data ; targeting
The effect of firms' partial retirement policies on the labour market outcomes of their employees by Martin Huber( )
8 editions published in 2013 in English and held by 14 WorldCat member libraries worldwide
In this paper, we assess the impact of firms introducing part-time work schemes for gradual labour market exit of elderly workers on their employees' labour market outcomes. The analysis is based on unique linked employer-employee data that combine high-quality survey and administrative data. Our results suggest that partial or gradual retirement options offered by firms are an important tool to alleviate the negative effects of low labour market attachment of elderly workers in ageing societies. When combined with financial incentives to hire unemployed or young jobseekers as replacement, they seem to be particularly beneficial, especially when labour market conditions are difficult. Under such circumstances, they can even have positive spill-over effects on younger workers. Firms should thus be encouraged to offer such schemes
Treatment evaluation in the presence of sample selection by Martin Huber( Book )
1 edition published in 2009 in English and held by 3 WorldCat member libraries worldwide
Quantile regression in the presence of sample selection by Martin Huber( Book )
1 edition published in 2011 in English and held by 2 WorldCat member libraries worldwide
Most sample selection models assume that the errors are independent of the regressors. Under this assumption, all quantile and mean functions are parallel, which implies that quantile estimators cannot reveal any (per definition non-existing) heterogeneity. However, quantile estimators are useful for testing the independence assumption, because they are consistent under the null hypothesis. We propose tests for this crucial restriction that are based on the entire conditional quantile regression process after correcting for sample selection bias. Monte Carlo simulations demonstrate that they are powerful and two empirical illustrations indicate that violations of this assumption are likely to be ubiquitous inlabor economics. Keywords: Sample selection, quantile regression, independence, test
Microeconometric Estimators and Tests based on Nonparametric Methods, Quantile Regression, and Resampling by Martin Huber( )
1 edition published in 2010 in English and held by 2 WorldCat member libraries worldwide
Testing instrument validity in sample selection models by Martin Huber( Book )
1 edition published in 2011 in English and held by 1 WorldCat member library worldwide
This paper proposes tests for instrument validity in sample selection models with non-randomly censored outcomes. Such models commonly invoke an exclusion restriction (i.e., the availability of an instrument affecting selection, but not the outcome) and additive separability of the errors in the selection process. These assumptions allow us to both point identify and bound the outcome distribution of the subpopulation of the always selected, whose outcomes are observed irrespective of the instrument value. As the point must lie within its bounds, this yields two testable inequality constraints. We apply our tests to two instruments conventionally exploited for the estimation of female wage equations: non-wife/husband's income and the number of (young) children. Considering eight empirical applications, our results suggest that the former is not a valid instrument, while the validity of the latter is not refuted on statistical grounds
Testing Instrument Validity in Measuring the Private Returns to Education by Mariana Gimpelewicz( )
1 edition published in 2013 in English and held by 1 WorldCat member library worldwide
This paper aims to investigate and test the validity of three different studies that use Instrumental Variables (IV) to identify private returns to education. We use the newly developed Huber-Mellace bootstrap for testing. Our secondary aim is to evaluate the test's performance in applying it to empirical data. The first study we analyse uses changes in compulsory education laws to estimate returns to schooling in North America and Great Britain. Results suggest that cohort controls are essential when using this IV. The second paper is a twin study that implements "cross-reporting" and a "within-pair" estimators on a sample of identical female twins. The small twin dataset restricts the test's power and exogeneity cannot not be rejected; however, complier shares indicate the presence of measurement error. This raises doubt about the validity of relying on twin-pair variation for estimation. The third study uses parental education as an instrument to estimate returns to education in the US. Results cannot reject the hypothesis that family background characteristics are exogenous. For the secondary aim, we find that some limitations arise in using the test to evaluate empirical data. They mainly stem from the need to convert treatment and instrument variables into dummies and the lack of a feature to introduce controls. Despite the constraints, the Huber-Mellace test provides a direct mean to quantify an assumption which, up until now, could only be supported with intuition. This is a significant step forward in the IV validity debate
Testing instrument validity for LATE identification based on inequality moment constraints by Martin Huber( Book )
1 edition published in 2011 in English and held by 1 WorldCat member library worldwide
This paper proposes bootstrap tests for the validity of instrumental variables (IV) in just identified treatment effect models with endogeneity. We demonstrate that the IV assumptions required for the identification of the local average treatment effect (LATE) allow us to both point identify and bound the mean potential outcomes (i) of the always takers (those treated irrespective of the instrument) under treatment and (ii) of the never takers (never treated irrespective of the instrument) under non-treatment. The point identified means must lie within their respective bounds, which provides four testable inequality moment constraints for IV validity. Furthermore, we show that a similar logic applies to testing the assumptions needed to identify distributional features (e.g., local quantile treatment effects). Finally, we discuss how testing power can be increased by imposing dominance/equality assumptions on the potential outcome distributions of different subpopulations
Automatised Sales Forecasting in Retail Using a Pattern Matching Algorithm Based on a Weighted Mahalanobis Distance by Tino Good( )
1 edition published in 2014 in English and held by 1 WorldCat member library worldwide
Der Einfluss soziodemographischer Faktoren auf das Einkommen in der Ukraine eine empirische Analyse by Alexandra Exner( )
1 edition published in 2012 in German and held by 1 WorldCat member library worldwide
Die vorliegende Arbeit untersucht den Effekt soziodemographischer Faktoren auf das Einkommen in der Ukraine in den Jahren 1992/93 und 1996. Mittels der Methode der kleinsten Quadrate (OLS) wird eine Einkommensfunktion in Anlehnung an Jabob Mincer geschätzt. Für 1993 zeigt sich ein signifikanter Einfluss des Geschlechts, des Universitätsabschlusses sowie der Sprache auf die Lohnhöhe. Ein Mann verdient monatlich durchschnittlich rund 60% mehr als eine Frau, ein Universitätsabschluss erhöht den Lohn im Vergleich zu keinem Schulabschluss um 37% und die ukrainische Muttersprache hat einen negativen Einfluss von 12% auf das Monatseinkommen. Demgegenüber haben 1996 neben dem Geschlecht die verschiedenen Bildungsabschlüsse sowie die Arbeitserfahrung einen positiven Einfluss auf die Einkommenshöhe und die Sprache erweist sich als insignifikant. Die Löhne von Männern und Frauen gleichen sich an. Je höher der erreichte Bildungsabschluss einer Person, desto höher ist das Einkommen im Vergleich zu einer Person, die keinen Schulabschluss erworben hat. Die Arbeitserfahrung hat einen positiven Lohneffekt von 3% für das erste Jahr Arbeitserfahrung. Der positive Effekt bleibt bis zu 23 Jahren Arbeitserfahrung erhalten, verringert sich jedoch mit jedem zusätzlichem Jahr aufgrund des abnehmenden Grenznutzens der Arbeitserfahrung. Gesamthaft sprechen diese Ergebnisse für eine fortschreitende Transformation vom Kommunismus hin zu marktwirtschaftlichen Strukturen
Effekt der Sprache auf den wirtschaftlichen Erfolg im ukrainischen Arbeitsmarkt by Simon Bühler( )
1 edition published in 2012 in German and held by 1 WorldCat member library worldwide
Der Effekt der Sprache auf den wirtschaftlichen Erfolg im ukrainischen Arbeitsmarkt wird mittels der Methode der kleinsten Quadrate (OLS) untersucht. Die Ergebnisse zeigen einen signifikanten Lohnvorteil der Russisch sprechenden Personen gegenüber den Ukrainisch sprechenden von ca. 12 % für 1992/3 und von ca. 16 % für 1996. Das Wachstum des Lohnvorteils überrascht, da im Zeitraum zwischen den Beobachtungen die ukrainische Sprache von der Regierung gezielt gefördert wurde. Eine mögliche Erklärung ist, dass die unter sowjetischer Herrschaft vorgenommene Förderung der russischen Sprache und die damit einhergehende Bevorteilung der russischen Ethnie nach der Unabhängigkeit zu einem Lohnvorteil führten, der gegenüber dem Effekt der Förderung der ukrainischen Sprache in der unabhängigen Ukraine überwiegt
Berufsbedingte Mobilität in der Schweiz eine empirische Analyse by Alexandra Exner( )
1 edition published in 2014 in German and held by 1 WorldCat member library worldwide
Die vorliegende Arbeit untersucht den Effekt soziodemographischer Faktoren auf die berufsbedingte Mobilität (Berufspendeln) in der Schweiz. Mittels der Methode der kleinsten Quadrate (OLS) und einer multinomialen logistischen Regression werden die Effekte geschätzt. Gesamthaft sprechen die Ergebnisse dafür, dass die individuelle Mobilitätsentscheidung eng mit der Lebensphase und soziodemographischen Merkmalen verknüpft ist. Es zeigt sich, dass insbesondere die Geburt von Kindern einen Wendepunkt im Mobilitätsverhalten darstellt. Jüngere Personen mit weniger festen Bindungen sind flexibler in ihrer Mobilität als Familien mit Kindern, wobei Männer mit der Geburt von Kindern weniger stark in ihrem Mobilitätsverhalten eingeschränkt werden als Frauen. Die Ergebnisse sprechen dafür, dass das Mobilitäts- bzw. Pendelverhalten eher auf eine kollektive Haushaltsentscheidung als auf eine ausschliesslich individuelle Entscheidung zurückzuführen ist
Fusschirurgie in der Praxis ( Book )
1 edition published in 2013 in German and held by 1 WorldCat member library worldwide
Identifizierung von direkten Effekten von Ausbildung auf den BMI und indirekten Effekten über das Einkommen Evidenz aus Australien by Thomas Aeschbacher( )
1 edition published in 2014 in German and held by 1 WorldCat member library worldwide
In der bisherigen Forschung wurde vor allem der Effekt einer höheren Bildung auf den BMI untersucht. Jedoch ist noch relativ unbekannt, was die zugrunde liegenden kausalen Mechanismen sind. Die vorliegende Arbeit untersucht insbesondere indirekte Effekte von Ausbildung auf den BMI über das Einkommen, wobei für die Schätzung Änderungen im Pflichtschulalter von australischen Bundesstaaten benützt werden. Dabei kann für Frauen ein nicht-monotoner indirekter Effekt des Einkommens nachgewiesen werden. So zeigt sich, dass dieser BMI-senkend für Frauen mit einem hohen Bildungsabschluss ist und BMI-erhöhend für jene mit einer niedrigen Anzahl an Ausbildungsjahren. Ebenso können für Frauen signifikante direkte Effekte von Ausbildung auf den BMI dargelegt werden. Diese sind über alle Ausbildungsstufen hinweg negativ
Sharp bounds on causal effects under sample selection by Martin Huber( Book )
1 edition published in 2011 in English and held by 1 WorldCat member library worldwide
In many empirical problems, the evaluation of treatment effects is complicated by sample selection such that the outcome is only observed for a non-random subpopulation. In the absence of instruments and/or tight parametric assumptions, treatment effects are not point identified, but can be bounded under mild restrictions. Previous work on partial identification has primarily focused on the "always selected" (whose outcomes are observed irrespective of the treatment). This paper complements those studies by considering further populations, namely the "compliers" (whose selection states react to the treatment) and the selected population. We derive sharp bounds under various assumptions (monotonicity and stochastic dominance) and provide an empirical application to a school voucher experiment
Eine ökonometrische Analyse des Einflusses des Eigenheimbesitzes auf die generelle subjektive Zufriedenheit der Schweizer BürgerInnen by Severine Hänni( )
1 edition published in 2013 in German and held by 1 WorldCat member library worldwide
Der Entscheid über mieten oder kaufen der eigenen Unterkunft gehört zu den Fragen, die sich die meisten Schweizer Bürger im Verlauf ihres Lebens ein- oder mehrmals stellen müssen. Die Politik in der Schweiz tendiert gegenwärtig dazu, den Eigenheimbesitz mit bestimmten Instrumenten zu fördern. Zudem ist dieses Thema immer wieder Teil von Bürgerinitiativen. Daher stellt sich die Frage, ob der Eigenheimbesitz tatsächlich politisch gefördert werden sollte. Ein nicht unwichtiger Argumentationspunkt in dieser Diskussion ist die Frage, ob das Besitzen der eigenen Wohnung oder des eigenen Hauses die generelle subjektive Zufriedenheit (GSZ) beeinflusst. Oder anders formuliert: Sind Eigenheimbesitzer glücklicher als Mieter? Dieser Frage wird in der vorliegenden Arbeit nachgegangen. Mittels Literaturanalyse und ökonometrischen Methoden konnte diese Frage positiv beantwortet werden. In der Literatur der ökonometrischen Analysen zu diesem Thema wurden fast ohne Ausnahme positive Effekte nachgewiesen. Auch mit der Ordinary Least Squares (OLS) Regression, dem Propensity-Score Matching und dem direkten Matching, welche alle auf Daten des Schweizer Haushaltspanels basieren, konnte in der vorliegenden Arbeit ein positiver Einfluss des Eigenheimerwerbes auf die GSZ herausgearbeitet werden. Dennoch bleiben gewisse Vorbehalte bezüglich der Gültigkeit der Annahmen zu beachten, welche für die Schätzergebnisse essentiell sind
How to Control for Many Covariates? Reliable Estimators Based on the Propensity Score by Martin Huber( )
1 edition published in 2010 in English and held by 1 WorldCat member library worldwide
We investigate the finite sample properties of a large number of estimators for the average treatment effect on the treated that are suitable when adjustment for observable covariates is required, like inverse probability weighting, kernel and other variants of matching, as well as different parametric models. The simulation design used is based on real data usually employed for the evaluation of labour market programmes in Germany. We vary several dimensions of the design that are of practical importance, like sample size, the type of the outcome variable, and aspects of the selection process. We find that trimming individual observations with too much weight as well as the choice of tuning parameters is important for all estimators. The key conclusion from our simulations is that a particular radius matching estimator combined with regression performs best overall, in particular when robustness to misspecifications of the propensity score is considered an important property. -- propensity score matching ; kernel matching ; inverse probability weighting ; selection on observables ; empirical Monte Carlo study ; finite sample properties
Do German welfare-to-work programmes reduce welfare and increase work? by Martin Huber( )
1 edition published in 2009 in English and held by 0 WorldCat member libraries worldwide
Many Western economies have reformed their welfare systems with the aim of activating welfare recipients by increasing welfare-to-work programmes and job search enforcement. We evaluate the three most important German welfare-to-work programmes implemented after a major reform in January 2005 (Hartz IV). Our analysis is based on a unique combination of large scale survey and administrative data that is unusually rich with respect to individual, household, agency level, and regional information. We use this richness to allow for a selection-on-observables approach when doing the econometric evaluation. We find that short-term training programmes on average increase their participants' employment perspectives and that all programmes induce further programme participation. We also show that there is considerable effect heterogeneity across different subgroups of participants that could be exploited to improve the allocation of welfare recipients to the specific programmes and thus increase overall programme effectiveness
Does leaving welfare improve health? Evidence for Germany by Martin Huber( )
1 edition published in 2009 in English and held by 0 WorldCat member libraries worldwide
Using exceptionally rich linked administrative and survey information on German welfare recipients we investigate the health effects of transitions from welfare to employment and of assignments to welfare-to-work programmes. Applying semi-parametric propensity score matching estimators we find that employment substantially increases (mental) health. The positive effects are mainly driven by males and individuals with bad initial health conditions and are largest for males with poor health. In contrast, the effects of welfare-to-work programmes, including subsidized jobs, are ambiguous and statistically insignificant for most outcomes. Robustness checks that include a semi-parametric instrumental variable approach do not provide reasons for concern
 
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Alternative Names
Huber, M. 1980-
Languages
English (36)
German (6)