Block Randomized Trials at Places: Rethinking the Limitations of Small N Experiments
Objectives Place-based policing experiments have led to encouraging findings regarding the ability of the police to prevent crime, but sample sizes in many of the key studies in this area are small. Farrington and colleagues argue that experiments with fewer than 50 cases per group are not likely to...
| Autores principales: | ; |
|---|---|
| Tipo de documento: | Electrónico Artículo |
| Lenguaje: | Inglés |
| Publicado: |
2014
|
| En: |
Journal of quantitative criminology
Año: 2014, Volumen: 30, Número: 1, Páginas: 97-112 |
| Acceso en línea: |
Volltext (lizenzpflichtig) Volltext (lizenzpflichtig) |
| Journals Online & Print: | Gargar...
|
| Verificar disponibilidad: | HBZ Gateway |
| Palabras clave: |
MARC
| LEADER | 00000caa a22000002c 4500 | ||
|---|---|---|---|
| 001 | 1764277066 | ||
| 003 | DE-627 | ||
| 005 | 20250323030916.0 | ||
| 007 | cr uuu---uuuuu | ||
| 008 | 210725s2014 xx |||||o 00| ||eng c | ||
| 024 | 7 | |a 10.1007/s10940-013-9196-z |2 doi | |
| 035 | |a (DE-627)1764277066 | ||
| 035 | |a (DE-599)KXP1764277066 | ||
| 040 | |a DE-627 |b ger |c DE-627 |e rda | ||
| 041 | |a eng | ||
| 084 | |a 2,1 |2 ssgn | ||
| 100 | 1 | |8 1\p |a Weisburd, David |d 1954- |e VerfasserIn |0 (DE-588)133584623 |0 (DE-627)548771499 |0 (DE-576)166603546 |4 aut | |
| 109 | |a Weisburd, David 1954- |a Weisburd, David L. 1954- |a Weisburd, David Lee 1954- | ||
| 245 | 1 | 0 | |a Block Randomized Trials at Places: Rethinking the Limitations of Small N Experiments |
| 264 | 1 | |c 2014 | |
| 336 | |a Text |b txt |2 rdacontent | ||
| 337 | |a Computermedien |b c |2 rdamedia | ||
| 338 | |a Online-Ressource |b cr |2 rdacarrier | ||
| 520 | |a Objectives Place-based policing experiments have led to encouraging findings regarding the ability of the police to prevent crime, but sample sizes in many of the key studies in this area are small. Farrington and colleagues argue that experiments with fewer than 50 cases per group are not likely to achieve realistic pre-test balance and have excluded such studies from their influential systematic reviews of experimental research. A related criticism of such studies is that their statistical power under traditional assumptions is also likely to be low. In this paper, we show that block randomization can overcome these design limitations. Methods Using data from the Jersey City Drug Market Analysis Experiment (N = 28 per group) we conduct simulations on three key outcome measures. Simulations of simple randomization with 28 and 50 cases per group are compared to simulations of block randomization with 28 cases. We illustrate the statistical modeling benefits of the block randomization approach through examination of sums of squares in GLM models and by estimating minimum detectable effects in a power analysis. Results The block randomization simulation is found to produce many fewer significantly unbalanced samples than the naïve randomization approaches both with 28 and 50 cases per group. Block randomization also produced similar or smaller absolute mean differences across the simulations. Illustrations using sums of squares show that error variance in the block randomization model is reduced for each of the three outcomes. Power estimates are comparable or higher using block randomization with 28 cases per group as opposed to naïve randomization with 50 cases per group. Conclusions Block randomization provides a solution to the small N problem in place-based experiments that addresses concerns about both equivalence and statistical power. The authors also argue that a 50 case rule should not be applied to block randomized place-based trials for inclusion in key reviews. | ||
| 650 | 4 | |a Policing | |
| 650 | 4 | |a Crime and place | |
| 650 | 4 | |a Equivalence | |
| 650 | 4 | |a Statistical power | |
| 650 | 4 | |a Block randomization | |
| 650 | 4 | |a Randomized controlled trials | |
| 700 | 1 | |8 2\p |a Gill, Charlotte |e VerfasserIn |0 (DE-588)1110064918 |0 (DE-627)864774214 |0 (DE-576)397850905 |4 aut | |
| 773 | 0 | 8 | |i Enthalten in |t Journal of quantitative criminology |d New York, NY [u.a.] : Springer Science + Business Media B.V., 1985 |g 30(2014), 1, Seite 97-112 |h Online-Ressource |w (DE-627)320578003 |w (DE-600)2017241-2 |w (DE-576)104082321 |x 1573-7799 |7 nnas |
| 773 | 1 | 8 | |g volume:30 |g year:2014 |g number:1 |g pages:97-112 |
| 856 | 4 | 0 | |u https://doi.org/10.1007/s10940-013-9196-z |x Resolving-System |z lizenzpflichtig |3 Volltext |
| 856 | 4 | 0 | |u http://link.springer.com/openurl/fulltext?id=doi:10.1007/s10940-013-9196-z |x Verlag |z lizenzpflichtig |3 Volltext |
| 883 | |8 1 |a cgwrk |d 20250301 |q DE-101 |u https://d-nb.info/provenance/plan#cgwrk | ||
| 883 | |8 2 |a cgwrk |d 20250301 |q DE-101 |u https://d-nb.info/provenance/plan#cgwrk | ||
| 935 | |a mkri | ||
| 951 | |a AR | ||
| ELC | |a 1 | ||
| LOK | |0 000 xxxxxcx a22 zn 4500 | ||
| LOK | |0 001 3957450489 | ||
| LOK | |0 003 DE-627 | ||
| LOK | |0 004 1764277066 | ||
| LOK | |0 005 20210725061645 | ||
| LOK | |0 008 210725||||||||||||||||ger||||||| | ||
| LOK | |0 035 |a (DE-2619)KrimDok#2021-07-24#AE28DAB869DB2A481D9DC0C4D3D001543365B8FA | ||
| LOK | |0 040 |a DE-2619 |c DE-627 |d DE-2619 | ||
| LOK | |0 092 |o n | ||
| LOK | |0 852 |a DE-2619 | ||
| LOK | |0 852 1 |9 00 | ||
| LOK | |0 935 |a zota | ||
| ORI | |a SA-MARC-krimdoka001.raw | ||
