Search results for "Propensity Score"
showing 10 items of 129 documents
205 Minimally invasive approaches in locally advanced cervical cancer patients undergoing radical surgery after chemoradiotherapy: a propensity score…
2020
Objectives To evaluate the oncological and surgical outcome of minimally invasive radical surgery (MI-RS) compared to open radical surgery (O-RS) in locally advanced cervical cancer (LACC) after preoperative chemoradiation (CT/RT). Methods Data relative to stage IB2-IVA cervical cancer patients managed by CT/RT and RS were retrospectively analyzed. Results Starting from 686 patients, the propensity score matching resulted in 462 cases (231 per group), balanced for FIGO stage, lymph node status, histotype, tumor grade and clinical response to CT/RT. Overall, 107 recurrences were registered with no difference in the pattern of recurrences between the two surgical approaches. The 5-year diseas…
The Association of Intraoperative driving pressure with postoperative pulmonary complications in open versus closed abdominal surgery patients – a po…
2021
Abstract Background It is uncertain whether the association of the intraoperative driving pressure (ΔP) with postoperative pulmonary complications (PPCs) depends on the surgical approach during abdominal surgery. Our primary objective was to determine and compare the association of time–weighted average ΔP (ΔPTW) with PPCs. We also tested the association of ΔPTW with intraoperative adverse events. Methods Posthoc retrospective propensity score–weighted cohort analysis of patients undergoing open or closed abdominal surgery in the ‘Local ASsessment of Ventilatory management during General Anaesthesia for Surgery’ (LAS VEGAS) study, that included patients in 146 hospitals across 29 countries.…
Selection bias, incentivi alle imprese e sviluppo locale: Una valutazione ex-post
2015
Questo lavoro si concentra sulla valutazione di un programma di aiuti alle imprese facente parte di un piu vasto programma per lo sviluppo locale realizzato in Italia durante il ciclo di programmazione comunitaria 2000-2006. Esso costituisce un approfondimento di una precedente analisi (Cusimano, Mazzola, 2014) di valutazione ex-post degli effetti dei regimi di aiuto previsti nell’ambito dei progetti integrati territoriali (pit), e mira ad identificare l’eventuale presenza di distorsione da selezione (selection bias) nella quantificazione dell’efficacia della politica. Mediante un’analisi empirica effettuata per mezzo di diverse metodologie basate sul propensity score matching (psm) viene m…
Schools opening and Covid-19 diffusion: Evidence from geolocalized microdata
2021
Are schools triggering the diffusion of the Covid-19? This question is at the core of an extensive debate about the social and long-run costs of stopping the economic activity and human capital accumulation from reducing the contagion. In principle, many confounding factors, such as climate, health system treatment, and other forms of restrictions, may impede disentangling the link between schooling and Covid-19 cases when focusing on a country or regional-level data. This work sheds light on the potential impact of school opening on the upsurge of contagion by combining a weekly panel of geocoded Covid-19 cases in Sicilian census areas with a unique set of school data. The identification o…
Re-examining the migration–trade link using province data: An application of the generalized propensity score
2013
Abstract The migration–trade link has been studied extensively since the mid nineties, finding a positive impact through different channels. Based on the generalized propensity score (GPS) methodology, we estimate a dose–response function, depicting a non-linear impact of immigration on exports using province data for Spain and Italy. For both countries the response of province exports to more immigrants from a given nationality is always positive, although varies with the level of immigrants. First we find neither minimum threshold nor exhaustion point in the effectiveness of the immigration networks on province exports. Second we find that the value of the potential bilateral exports reac…
Heterogeneidad en el impacto de la política de becas en la escolaridad secundaria postobligatoria en España: un análisis por subgrupos poblacionales
2013
El presente trabajo analiza el impacto de las becas sobre la probabilidad de finalizar con éxito el nivel secundario postobligatorio en España en el caso de diferentes subgrupos poblacionales. Se aplica un diseño cuasiexperimental (Propensity score matching) a partir de la Encuesta de Condiciones de Vida (ECV-2006). Los resultados confirman la existencia de efectos diferenciales positivos (con relación al impacto medio) de la política educativa en el caso de las mujeres y de los alumnos provenientes de hogares desfavorecidos, demostrando la existencia de heterogeneidad en el impacto de la política analizada.
Foreign capital, credit constraints and continuity of firms’ R&D
2015
ABSTRACTIn this article, we investigate the role of foreign capital participation as a means for firms to overcome the obstacle posed by credit constraints to sustain R&D investments. Using data for Spanish manufacturing firms in the period 1990–2006, we show that firms with foreign capital are significantly less likely to stop already initiated R&D projects and also more likely to sustain R&D investment when facing credit constraints. Our results are robust to positive selection into foreign capital participation, which we control through a set of variables chosen from a propensity score estimation, and to firms’ fixed-effects.
Foreign Taleovers and Wages: Theory and Evidence from Hungary
2005
This study discriminates FDI technology spillover from learning effects. Whenever learning takes time, our model predicts that foreign investors deduct the economic value of learning from wages of inexperienced workers and add it to experienced ones to prevent them from moving to local competitors. Hence, the national wage bill is unaffected by foreign takeovers. In contrast to learning, technology spillover effects occur whenever a worker with MNE experience contributes more to local firms’ than to MNEs’ productivity. In this case, experienced MNE workers are hired by local firms and the host country obtains a welfare gain. We investigate empirically wages, productivity, and worker turnove…
Modeling temporal treatment effects with zero inflated semi-parametric regression models: The case of local development policies in France
2017
International audience; A semi-parametric approach is proposed to estimate the variation along time of the effects of two distinct public policies that were devoted to boost rural development in France over a similar period of time. At a micro data level, it is often observed that the dependent variable, such as local employment, does not vary along time, so that we face a kind of zero inflated phenomenon that cannot be dealt with a continuous response model. We introduce a conditional mixture model which combines a mass at zero and a continuous response. The suggested zero inflated semi-parametric statistical approach relies on the flexibility and modularity of additive models with the abi…
Selection bias ed incentivi alle imprese nei programmi per lo sviluppo locale: una valutazione ex-post
2015
This paper focuses on the evaluation of an aid scheme included in a larger local development program realized in Italy during the 2000-2006 cycle of EU Structural Funds. It follows a previous analysis (Cusimano, Mazzola, 2014) on the ex-post evaluation of the effects of the aid schemes included in the so-called territorial integrated projects (tips) and aims at identifying the possible presence of selection bias in measuring the effectiveness of the policy. After running an empirical analysis based on several propensity score matching (psm) methods, we show that, at least partially, the positive results previously obtained may not be related to an effective success of the policy, but could …