scholarly journals Editorial Introduction: field experiments and public policy

2020 ◽  
Vol 5 (1) ◽  
pp. 1-1
Author(s):  
GEORGE AKERLOF ◽  
ADAM OLIVER ◽  
CASS SUNSTEIN
2020 ◽  
Vol 5 (1) ◽  
pp. 117-124 ◽  
Author(s):  
GLENN W. HARRISON

AbstractThe current state of the art in field experiments does not give me any confidence that we should be assuming that we have anything worth scaling, assuming we really care about the expected welfare of those about to receive the instant intervention. At the very least, we should be honest and explicit about the need for strong priors about the welfare effects of changes in averages of observables to warrant scaling. What we need is a healthy dose of theory and the implied econometrics.


2021 ◽  
pp. 074391562110327
Author(s):  
Yixing Chen ◽  
Shrihari Sridhar ◽  
Vikas Mittal

Many public-policy studies (Martin and Scott 2020) use randomized field experiments for drawing causal conclusions (e.g., Chen et al. 2020). A typical randomized field experiment involves a control group and a treatment group to which individual units (e.g., consumers, patients) are randomly assigned, after which an intervention is implemented in the treatment group. An intervention could be a marketing program to which only units in the treatment group are exposed. To assess the intervention's efficacy, researchers typically estimate the average treatment effect computed as the mean difference in the outcome between the units in the treatment group and the control group. When applying the results of a randomized experiment, it is assumed that the treatment effect within the manipulated condition is the same for all the units assigned to the treatment condition. This may not always be the case, as the effect may differ for subgroups within a treatment (subgroup differences).


Urban Studies ◽  
2021 ◽  
pp. 004209802110060
Author(s):  
Sylvain Chareyron ◽  
Laetitia Challe ◽  
Yannick L’Horty ◽  
Pascale Petit

‘Emplois Francs’ is a new public policy in France that provides financial assistance to companies when they hire a jobseeker living in a disadvantaged neighbourhood. This study evaluates the effect of this policy by using three waves of correspondence tests spaced six months apart to measure discrimination in access to employment based on ethnic origin and place of residence. We find a substantial level of discrimination based on ethnic origin and a lower level of residential discrimination. We find that the programme decreases residential discrimination after six months, but we cannot conclude that the effect is still present 12 months later.


2018 ◽  
Vol 54 ◽  
pp. 1-4
Author(s):  
Arye L. Hillman ◽  
Daniel Schiffman ◽  
Idit Sohlberg ◽  
Thomas Stratmann

2019 ◽  
Vol 48 (1) ◽  
pp. 3-21
Author(s):  
Christopher B. Mann ◽  
Kevin Arceneaux ◽  
David W. Nickerson

A multitude of laboratory experiments show that subtle shifts in framing can induce individuals to participate in political activity. Using four randomized field experiments, we tested whether exposure to messages framing public policy proposals negatively increased political action relative to exposure to messages framing the proposal positively. Three experiments use a type of political participation novel to the field experiments literature: phone calls recruiting people to contact elected officials. Contrary to expectations from prior laboratory experiments on intention to participate in collective action in politics, we find scant evidence that messages framed negatively about the policy returns from participation are more effective than messages framed positively about the policy returns from participation at motivating real-world political behavior.


Author(s):  
M. Jose Yacaman

In the Study of small metal particles the shape is a very Important parameter. Using electron microscopy Ino and Owaga(l) have studied the shape of twinned particles of gold. In that work electron diffraction and contrast (dark field) experiments were used to produce models of a crystal particle. In this work we report a method which can give direct information about the shape of an small metal particle in the amstrong- size range with high resolution. The diffraction pattern of a sample containing small metal particles contains in general several systematic and non- systematic reflections and a two-beam condition can not be used in practice. However a N-beam condition produces a reduced extinction distance. On the other hand if a beam is out of the bragg condition the effective extinction distance is even more reduced.


ASHA Leader ◽  
2012 ◽  
Vol 17 (15) ◽  
pp. 23-23
Author(s):  
George Lyons
Keyword(s):  

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