scholarly journals Evaluating the effectiveness of flood damage mitigation measures by the application of Propensity Score Matching

2014 ◽  
Vol 2 (1) ◽  
pp. 681-723 ◽  
Author(s):  
P. Hudson ◽  
W. J. W. Botzen ◽  
H. Kreibich ◽  
P. Bubeck ◽  
J. C. J. H. Aerts
Keyword(s):  
Propensity Score ◽  
Propensity Score Matching ◽  
Flood Damage ◽  
Mitigation Measures ◽  
Policy Recommendations ◽  
Mitigation Potential ◽  
Future Studies ◽  
Damage Mitigation ◽  
Risk Characteristics ◽  
Integrated Flood Risk Management

Abstract. The employment of damage mitigation measures by individuals is an important component of integrated flood risk management. In order to promote efficient damage mitigation measures, accurate estimates of their damage mitigation potential are required. That is, for correctly assessing the damage mitigation measures' effectiveness from survey data, one needs to control for sources of bias. A biased estimate can occur if risk characteristics differ between individuals who have, or have not, implemented mitigation measures. This study removed this bias by applying an econometric evaluation technique called Propensity Score Matching to a survey of German households along along two major rivers major rivers that were flooded in 2002, 2005 and 2006. The application of this method detected substantial overestimates of mitigation measures' effectiveness if bias is not controlled for, ranging from nearly € 1700 to € 15 000 per measure. Bias-corrected effectiveness estimates of several mitigation measures show that these measures are still very effective since they prevent between € 6700–14 000 of flood damage. This study concludes with four main recommendations regarding how to better apply Propensity Score Matching in future studies, and makes several policy recommendations.

scholarly journals Evaluating the effectiveness of flood damage mitigation measures by the application of propensity score matching

2014 ◽  
Vol 14 (7) ◽  
pp. 1731-1747 ◽  
Author(s):  
P. Hudson ◽  
W. J. W. Botzen ◽  
H. Kreibich ◽  
P. Bubeck ◽  
J. C. J. H. Aerts
Keyword(s):  
Propensity Score ◽  
Propensity Score Matching ◽  
Flood Damage ◽  
Mitigation Measures ◽  
Policy Recommendations ◽  
Mitigation Potential ◽  
Future Studies ◽  
Damage Mitigation ◽  
Risk Characteristics ◽  
Integrated Flood Risk Management

Abstract. The employment of damage mitigation measures (DMMs) by individuals is an important component of integrated flood risk management. In order to promote efficient damage mitigation measures, accurate estimates of their damage mitigation potential are required. That is, for correctly assessing the damage mitigation measures' effectiveness from survey data, one needs to control for sources of bias. A biased estimate can occur if risk characteristics differ between individuals who have, or have not, implemented mitigation measures. This study removed this bias by applying an econometric evaluation technique called propensity score matching (PSM) to a survey of German households along three major rivers that were flooded in 2002, 2005, and 2006. The application of this method detected substantial overestimates of mitigation measures' effectiveness if bias is not controlled for, ranging from nearly EUR 1700 to 15 000 per measure. Bias-corrected effectiveness estimates of several mitigation measures show that these measures are still very effective since they prevent between EUR 6700 and 14 000 of flood damage per flood event. This study concludes with four main recommendations regarding how to better apply propensity score matching in future studies, and makes several policy recommendations.

Impact Evaluation of Chile Solidario: Lessons and Policy Recommendations

2012 ◽  
Vol 44 (2) ◽  
pp. 347-372 ◽  
Author(s):  
OSVALDO LARRAÑAGA ◽  
DANTE CONTRERAS ◽  
JAIME RUIZ-TAGLE
Keyword(s):  
Social Networks ◽  
Propensity Score ◽  
Propensity Score Matching ◽  
Family Support ◽  
Environmental Conditions ◽  
Impact Evaluation ◽  
Negative Impact ◽  
Policy Recommendations ◽  
Small Impact ◽  
The Impact

AbstractThis article evaluates the impact of the Chile Solidario anti-poverty programme. The evaluation is based on propensity score matching and a difference-in-difference estimator along with databases of Social Assistance Committee forms. The results show a positive but small impact on employment and housing along with a slightly negative impact on self-generated income. They also suggest that gains tend to be concentrated in the first phase, during which beneficiaries work with a family support professional, and that these benefits may not be sustainable. Participant families show absolute gains in income and employment, but these may be attributed to environmental conditions rather than the programme; this raises doubts about the premise that these families were initially marginalised from the economy and social networks.

scholarly journals Long-term development and effectiveness of private flood mitigation measures: an analysis for the German part of the river Rhine

2012 ◽  
Vol 12 (11) ◽  
pp. 3507-3518 ◽  
Author(s):  
P. Bubeck ◽  
W. J. W. Botzen ◽  
H. Kreibich ◽  
J. C. J. H. Aerts
Keyword(s):  
Flood Damage ◽  
Flood Risk Management ◽  
Flood Mitigation ◽  
Mitigation Measures ◽  
Flood Events ◽  
Private Households ◽  
Integrated Flood Risk Management ◽  
German Part ◽  
Over Time

Abstract. Flood mitigation measures implemented by private households have become an important component of contemporary integrated flood risk management in Germany and many other countries. Despite the growing responsibility of private households to contribute to flood damage reduction by means of private flood mitigation measures, knowledge on the long-term development of such measures, which indicates changes in vulnerability over time, and their effectiveness, is still scarce. To gain further insights into the long-term development, current implementation level and effectiveness of private flood mitigation measures, empirical data from 752 flood-prone households along the German part of the Rhine are presented. It is found that four types of flood mitigation measures developed gradually over time among flood-prone households, with severe floods being important triggers for an accelerated implementation. At present, still a large share of respondents has not implemented a single flood mitigation measure, despite the high exposure of the surveyed households to floods. The records of household's flood damage to contents and structure during two consecutive flood events with similar hazard characteristics in 1993 and 1995 show that an improved preparedness of the population led to substantially reduced damage during the latter event. Regarding the efficiency of contemporary integrated flood risk management, it is concluded that additional policies are required in order to further increase the level of preparedness of the flood-prone population. This especially concerns households in areas that are less frequently affected by flood events.

Besondere Förderung von Kern- kompetenzen an Spezialgymnasien?

2010 ◽  
Vol 24 (1) ◽  
pp. 5-22 ◽  
Author(s):  
Jürgen Baumert ◽  
Michael Becker ◽  
Marko Neumann ◽  
Roumiana Nikolova
Keyword(s):  
Propensity Score ◽  
Propensity Score Matching

Der vorliegende Beitrag geht der Frage nach, ob Schülerinnen und Schüler, die nach der vierten Klasse in Berlin in ein grundständiges Gymnasium wechseln, in Abhängigkeit vom Profil des besuchten Gymnasiums im Vergleich zu Grundschülern mit vergleichbaren Lernvoraussetzungen unterschiedliche Lernzuwächse im Leseverständnis, in Mathematik und Englisch erreichen. Auf der Datengrundlage der ELEMENT-Studie wurde die Leistungsentwicklung von Schülerinnen und Schülern an grundständigen Gymnasien (N = 1758) und Grundschulen (N = 3169) während der 5. und 6. Jahrgangsstufe mithilfe von Propensity Score Matching-Analysen (PSM) modelliert. Nach Kontrolle von leistungsrelevanten Unterschieden zwischen den Schülergruppen am Ende der 4. Jahrgangsstufe zeigten sich für das Leseverständnis am Ende der 6. Klasse keine statistisch signifikanten Unterschiede. Für die Mathematikleistung ließen sich Unterschiede lediglich zugunsten eines grundständigen Gymnasiums, das zum Untersuchungszeitpunkt noch kein spezifisches Profil entwickelt hatte, nachweisen. In der Domäne Englisch, in der die curricularen Unterschiede zwischen den Schulzweigen stärker akzentuiert sind, wurden positive Ergebnisse im Vergleich zu den Grundschulen für die so genannten Schnellläuferzüge, die englisch-bilingualen Klassen und das grundständige Gymnasium ohne spezifisches Profil ermittelt. Die Lernstände am Ende der 6. Klasse in den altsprachlichen Gymnasien fielen dagegen im Vergleich zu den Grundschulen geringer aus. Die Befunde widersprechen der Annahme, dass mit dem frühen Übergang auf ein grundständiges Gymnasium automatisch eine besondere Förderung der Lesefähigkeit und des mathematischen Verständnisses besonders leistungsfähiger Schülerinnen und Schüler erreicht werde. Die Ergebnisse zu den Englischleistungen weisen hingegen darauf hin, dass Unterschiede in der Leistungsentwicklung auftreten können, sofern die Aufteilung auf Schulen mit unterschiedlichen Bildungsprogrammen mit curricularen Unterschieden im Unterricht einhergeht. Methodische und inhaltliche Implikationen der Befunde und Grenzen ihrer Generalisierbarkeit werden diskutiert.

Validating Four Standard Scales in Spiritually Practicing and Nonpracticing Samples Using Propensity Score Matching

2008 ◽  
Vol 24 (3) ◽  
pp. 165-173 ◽  
Author(s):  
Niko Kohls ◽  
Harald Walach
Keyword(s):  
Propensity Score ◽  
Propensity Score Matching ◽  
Repeated Measures ◽  
Propensity Scores ◽  
Total Sample ◽  
Experimental Manipulation ◽  
Brief Symptom Inventory ◽  
Time Interaction ◽  
Social Support Scale ◽  
Lower Test

Validation studies of standard scales in the particular sample that one is studying are essential for accurate conclusions. We investigated the differences in answering patterns of the Brief-Symptom-Inventory (BSI), Transpersonal Trust Scale (TPV), Sense of Coherence Questionnaire (SOC), and a Social Support Scale (F-SoZu) for a matched sample of spiritually practicing (SP) and nonpracticing (NSP) individuals at two measurement points (t1, t2). Applying a sample matching procedure based on propensity scores, we selected two sociodemographically balanced subsamples of N = 120 out of a total sample of N = 431. Employing repeated measures ANOVAs, we found an intersample difference in means only for TPV and an intrasample difference for F-SoZu. Additionally, a group × time interaction effect was found for TPV. While Cronbach’s α was acceptable and comparable for both samples, a significantly lower test-rest-reliability for the BSI was found in the SP sample (rSP = .62; rNSP = .78). Thus, when researching the effects of spiritual practice, one should not only look at differences in means but also consider time stability. We recommend propensity score matching as an alternative for randomization in variables that defy experimental manipulation such as spirituality.

Propensity Score Matching in Cross-Lingual Test Equating

2012 ◽  
Author(s):  
Xin Liu ◽  
Xiaobin Zhou ◽  
Jianjun Zhu ◽  
Jing-Jen Wang
Keyword(s):  
Propensity Score ◽  
Propensity Score Matching ◽  
Test Equating ◽  
Cross Lingual
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