scholarly journals Anti-Crime Laws and Retail Prices

2017 ◽  
Vol 13 (3) ◽  
Author(s):  
Hakan Yilmazkuday
Keyword(s):  
Natural Experiment ◽  
Retail Trade ◽  
Gasoline Prices ◽  
Control Group ◽  
Recent Experience ◽  
Difference In Difference ◽  
Sacramento County ◽  
Retail Prices ◽  
Additional Costs ◽  
Security Surveillance

AbstractThe fear of becoming a victim of crime acts as a barrier to retail trade for consumers, where retailers attempt to reduce such barriers by enduring additional costs such as insurance or security/surveillance; as a result, retail prices are affected by the possibility of crime. This paper attempts to measure such effects by considering the recent experience of Sacramento County in California, where an anti-panhandling ordinance has been issued to protect retailers. As an application, a difference-in-difference approach is employed to identify the effects of the ordinance on Sacramento gasoline prices at the retail level, by considering the gasoline prices in neighboring counties as the control group of a natural experiment. The results show that the anti-panhandling ordinance has resulted in lower gasoline prices in Sacramento County.

scholarly journals A difference-in-difference analysis comparing a control and an intervention social housing area

2020 ◽  
Vol 30 (Supplement_5) ◽  
Author(s):  
S Nygaard ◽  
A Srivarathan ◽  
J Mathisen ◽  
R Lund
Keyword(s):  
Social Factors ◽  
Social Housing ◽  
Natural Experiment ◽  
Structural Changes ◽  
Control Area ◽  
Control Group ◽  
Difference In Difference ◽  
Entire Study ◽  
Structural Intervention ◽  
Housing Area

Abstract Often an intervention is applied in an area (e.g. community, municipality) without it being an experiment and without a control group, this can be categorized as a natural experiment. Such a situation offers the opportunity to exploit exposure contrasts between areas regarding the specific intervention for evaluation. In the present study, we will employ the difference-in-difference approach to evaluate the natural experiment (the structural intervention) comparing measures of health and social factors retrieved from registers in the two social housing areas before and after the intervention. A 'natural experiment' study comparing individual and aggregated level differences in register-based information on health and social variables across time including the entire study period is included in the research project. The population includes all residents with an address in the study area and the control area at any point during the years 2015-2025 (∼3,000 residents in each area). All residents are linked to the Danish social and health registers by the unique personal identification number, which makes it possible to follow all permanent and former residents over time. Hereby we plan to study if the structural changes (the structural intervention, the 'natural experiment') give rise to differences in health (such as use of general practitioner, hospitalizations, use of selected medications) and social factors (e.g. divorces, income levels, unemployment) compared to the control area. The control area is representing a similar social housing area in the same municipality, which will not undergo structural changes until 2023. Findings will be evaluated drawing upon knowledge gained from the entire study from surveys and qualitative interviews as well experiences from the interventions. In this presentation, we wish to discuss how best to include the knowledge based on other methodologies in the register-based analyses.

scholarly journals Impact of banning smoking in cars with children on exposure to second-hand smoke: a natural experiment in England and Scotland

2019 ◽  
Author(s):  
Anthony A Laverty ◽  
Thomas Hone ◽  
Philip E. Anyanwu ◽  
David Taylor Robinson ◽  
Frank de Vocht ◽  
...  
Keyword(s):  
Logistic Regression ◽  
Survey Data ◽  
Tobacco Smoke ◽  
Natural Experiment ◽  
Second Hand Smoke ◽  
Regression Analyses ◽  
Difference In Difference ◽  
Difference In Differences ◽  
Survey Weighting ◽  
The Impact

ABSTRACTA ban on smoking in cars with children was implemented in April 2015 in England and December 2016 in Scotland. With survey data from both countries (NEngland=3,483-6,920 and NScotland=232-319), we used this natural experiment to assess the impact of the ban using a difference-in-differences approach. We conducted logistic regression analyses within a Difference-in-Difference framework and adjusted for age, sex, a marker of deprivation and survey weighting for non-response. Among children aged 13-15 years, self-reported levels of regular exposure to smoke in cars were 3.4% in 2012, 2.2% in 2014 and 1.3% in 2016 for Scotland and 6.3%, 5.9% and 1.6% in England. The ban was associated with a 73% reduction (95%CI -59%, -81%) in self-reported exposure to tobacco smoke among children.

Interprofessional Teamwork Innovation Model (ITIM) to promote communication and patient-centred, coordinated care

2018 ◽  
Vol 27 (9) ◽  
pp. 700-709 ◽  
Author(s):  
Jing Li ◽  
Preetham Talari ◽  
Andrew Kelly ◽  
Barbara Latham ◽  
Sherri Dotson ◽  
...  
Keyword(s):  
Hospital Readmissions ◽  
Intervention Group ◽  
Hospital Setting ◽  
Control Group ◽  
Difference In Difference ◽  
Academic Medical Centre ◽  
Difference Analysis ◽  
Interprofessional Teamwork ◽  
Innovation Model ◽  
Ed Visits

BackgroundDespite recommendations and the need to accelerate redesign of delivery models to be team-based and patient-centred, professional silos and cultural and structural barriers that inhibit working together and communicating effectively still predominate in the hospital setting. Aiming to improve team-based rounding, we developed, implemented and evaluated the Interprofessional Teamwork Innovation Model (ITIM).MethodsThis quality improvement (QI) study was conducted at an academic medical centre. We followed the system’s QI framework, FOCUS-PDSA, with Lean as guiding principles. Primary outcomes included 30-day all-cause same-hospital readmissions and 30-day emergency department (ED) visits. The intervention group consisted of patients receiving care on two hospitalist ITIM teams, and patients receiving care from other hospitalist teams were matched with a control group. Outcomes were assessed using difference-in-difference analysis.ResultsTeam members reported enhanced communication and overall time savings. In multivariate modelling, patients discharged from hospitalist teams using the ITIM approach were associated with reduced 30-day same-hospital readmissions with an estimated point OR of 0.56 (95% CI 0.34 to 0.92), but there was no impact on 30-day same-hospital ED visits. Difference-in-difference analysis showed that ITIM was not associated with changes in average total direct costs nor average cost per patient day, after adjusting for all other covariates in the models, despite the addition of staff resources in the ITIM model.ConclusionThe ITIM approach facilitates a collaborative environment in which patients and their family caregivers, physicians, nurses, pharmacists, case managers and others work and share in the process of care.

Impact of Medicaid expansion on pancreatic cancer care: A difference-in-difference analysis.

2021 ◽  
Vol 39 (15_suppl) ◽  
pp. e18567-e18567
Author(s):  
Ahmad Hamad ◽  
Mariam Eskander ◽  
Yaming Li ◽  
Oindrila Bhattacharyya ◽  
James L Fisher ◽  
...  
Keyword(s):  
Low Income ◽  
Early Stage ◽  
Ductal Adenocarcinoma ◽  
Control Group ◽  
Medicaid Expansion ◽  
Difference In Difference ◽  
Post Surgery ◽  
Number Of Patients ◽  
The Impact ◽  
Expansion Period

e18567 Background: The Affordable Care Act (ACA) increased insurance coverage for low-income individuals, which should potentially lead to better access to care and improved oncological outcomes. This study seeks to evaluate the impact of Medicaid expansion (ME) on care for pancreatic ductal adenocarcinoma (PDAC). Methods: Patients who were uninsured or on Medicaid and diagnosed with PDAC between 2004 and 2017 were queried from the National Cancer Database (NCDB). Two different expansion cohorts were included: early expansion states and 2014 expansion states. For early expansion states, the time period of pre-expansion was 2004-2009 and post-expansion was 2010-2017. As for the 2014 expansion states, the pre-expansion period was from 2004-2013 and post-expansion period was from 2014-2017. Patients in non-expansion states formed the control group. A difference-in-difference (DID) analysis was used to assess the association of ME with stage of diagnosis, treatment and survival for each expansion cohort. Results: In both early and January 2014 expansion states, there was an increase in overall Medicaid coverage (Early: DID = 0.29, 2014: DID = 0.37; P < 0.001), in particular for non-Hispanic Black and Hispanic Black patients (Non-Hispanic Black: Early: DID = 0.11, 2014: DID = 0.11; P < 0.001, Hispanic-Black: 2014: DID = 0.20; P = 0.003). There were no differences in early stage diagnosis (Early: DID = 0.02, 2014: DID = -0.02; P > 0.05). There was an increase in the number of patients receiving surgery (Early: DID = 0.05; P = 0.001, 2014: DID = 0.03; P = 0.029) but no difference in time to surgery among patients receiving surgery upfront (Early: DID = 1.75, 2014: DID = 0.38; P > 0.05). There was no difference in 30-day readmission post-surgery (Early: DID = 0.003; 2014: DID = -0.00007; P > 0.05) or 90-day mortality (Early: DID = -0.007, 2014: DID = -0.035; P > 0.05). Moreover, there was no difference in receipt of chemotherapy (Early: DID = 0.01, 2014: DID = 0.005; P > 0.05) or time to chemotherapy for patients receiving neoadjuvant chemotherapy (Early: Early: DID = 9.62, 2014: DID = 0.01; P > 0.05). Finally, there was no difference in receipt of palliative care among stage IV patients in both cohorts (Early: DID = -0.004, 2014: DID = 0.004; P > 0.05). Conclusions: This study suggests that after ME, PDAC patients were more likely to be insured and had increased access to surgical care. Future, studies should evaluate the implications of improved surgical access on clinical outcomes such as mortality.

scholarly journals Impact of Decreased Night Work on Workers’ Musculoskeletal Symptoms: A Quasi-Experimental Intervention Study

2020 ◽  
Vol 17 (23) ◽  
pp. 9092
Author(s):  
Hye-Eun Lee ◽  
Min Choi ◽  
Hyoung-Ryoul Kim ◽  
Ichiro Kawachi
Keyword(s):  
Musculoskeletal Pain ◽  
Night Shift ◽  
Night Work ◽  
Musculoskeletal Symptoms ◽  
Control Group ◽  
Body Parts ◽  
Difference In Difference ◽  
Post Intervention ◽  
Shift Workers ◽  
The Impact

A possible association between night shift work and musculoskeletal disorder has been suggested. This study aimed to evaluate the impact of decreased night work on musculoskeletal pain. Difference-in-difference estimation was used to compare changes in musculoskeletal pain between shift workers (N = 122) and non-shift workers (N = 170) in a manufacturing company before and after the introduction of a new shift system eliminating overnight work. Musculoskeletal pain was measured by a questionnaire asking if workers had symptoms in specific body parts, including the neck, shoulder, arm/elbow, wrist/hand, back, and leg/foot, over the past year. Generalized estimating equation models were used to estimate changes in pre- versus post-intervention musculoskeletal pain rates between the treated and control group. In the difference-in-difference (DID) models, prevalence of musculoskeletal pain for shoulder (−10.3%), arm (−12.9%), all sites combined (−9.2%), and upper extremity combined (−14.8%) showed significant decreases from pre- to post-intervention among the treated group (shift workers) compared to the control group (non-shift workers) after controlling for age and weekly working hours. Decreasing night work was related to improvement in musculoskeletal pain in shift workers.

scholarly journals Effects of a Dementia Screening Program on Healthcare Utilization in South Korea: A Difference-In-Difference Analysis

2019 ◽  
Vol 16 (20) ◽  
pp. 3837 ◽  
Author(s):  
Su Jung Lee ◽  
Hyun-Ju Seo ◽  
Dong Young Lee ◽  
So-Hyun Moon
Keyword(s):  
Screening Program ◽  
Drug Prescription ◽  
Healthcare Services ◽  
Control Group ◽  
Difference In Difference ◽  
Difference Analysis ◽  
Screening Programs ◽  
Dementia Screening ◽  
People With Dementia ◽  
Prescription Rates

To determine whether Seoul’s dementia screening program increased the rate of diagnosis and the appropriate use of healthcare services for people with dementia, a retrospective data analysis was conducted based on administrative data from the Health Insurance Review and Assessment Service. Two cohorts were constructed to represent the year before Seoul’s dementia screening program began (2007) (control group) and the year after the implementation of the program (2009) (treatment group). A difference-in-difference analysis was used to compare the diagnosis rates, number of clinic visits, and dementia-related drug prescription rates for 4 districts that implemented dementia screening programs between 2007 and 2009 and 14 areas that did not. After the introduction of the program, there was a 55.4% increase in physician-diagnosed dementia. The “average drug cost per patient” increased by 52.2% (Exp(β) = 1.522, p = 0.0264), the “average outpatient visits per patient” tended to increase by 13.5% (Exp(β) = 1.135, p = 0.1852), and the “average outpatient treatment fees per visit per patient” tended to increase by 24.4% (Exp(β) = 1.244, p = 0.0821). The implementation of dementia screening programs led to an increase in healthcare service utilization. Therefore, this program was found to be an effective strategy for reducing undiagnosed dementia cases and encouraging patients to use adequate healthcare services.

scholarly journals The Impact of Green Credit Guidelines on the Technological Innovation of Heavily Polluting Enterprises: A Quasi-Natural Experiment from China

2020 ◽  
Vol 2020 ◽  
pp. 1-13
Author(s):  
Fangjing Hao ◽  
Yuantao Xie ◽  
Xiaojiao Liu
Keyword(s):  
Sustainable Development ◽  
Technological Innovation ◽  
Natural Experiment ◽  
Technological Innovations ◽  
Control Group ◽  
Porter Hypothesis ◽  
Primary Finding ◽  
The Impact ◽  
Positive Effect ◽  
Experimental Group

This study investigates the impact of China’s Green Credit Guidelines on the technological innovations of heavily polluting enterprises. This study uses data obtained from the CSMAR database (2007–2018) and China Marketization Index Report by Province 2018 and uses the Green Credit Guidelines as a quasi-natural experiment. The sample was divided into an experimental group and a control group; the experimental group disclosed environmental and sustainable development information, while the control group did not. This study’s primary finding is that the Green Credit Guidelines can improve the level of technological innovation of heavily polluting enterprises and have a greater impact in areas with high levels of marketization, indicating that the Green Credit Guidelines have a positive effect on the technological innovation of heavily polluting enterprises. This provides China with an experience constructing relevant policies and regulations and provides empirical evidence regarding the technological innovations of heavily polluting enterprises from the perspective of factor market distortions and the Porter hypothesis.

Investigating Category Pricing Behavior at a Retail Chain

2002 ◽  
Vol 39 (2) ◽  
pp. 141-154 ◽  
Author(s):  
Pradeep K. Chintagunta
Keyword(s):  
Wholesale Price ◽  
Product Category ◽  
Store Brand ◽  
Retail Competition ◽  
Specific Product ◽  
Pricing Rules ◽  
Pricing Behavior ◽  
Retail Prices ◽  
Additional Costs ◽  
Retail Grocery

In studying retailer pricing behavior, researchers typically assume that retailers maximize profits across all brands in a focal product category. In this article, the author attempts to study empirically the extent to which three factors affect retail prices: (1) the effects of payments from manufacturers to the retailer other than regular promotions, as well as the effects of additional costs borne by the retailer for these brands; (2) the retailer's objectives specific to its store brand, such as maximizing store brand share; and (3) the effects of retail competition and store traffic. By specifying a demand function at the brand-chain level for each brand in the product category, the author derives pricing rules for the retailer. The author decomposes the retail price of a brand into effects due to wholesale price, markup (obtained from the demand functions), additional promotional payments, retail competition, and the retailer's objectives for the store brand. The author carries out empirical analysis for a specific product category at a single retail grocery chain. The results indicate that the effects of the three factors vary across brands in the category.

scholarly journals The sales effect of in-store product displays: The special case of total product relocation

2020 ◽  
Vol 15 (01) ◽  
Author(s):  
Daniel Weimar ◽  
◽  
Christian Deutscher ◽  
Reinhold Decker ◽  
◽  
...  
Keyword(s):  
Control Group ◽  
Product Selection ◽  
Total Product ◽  
Store Product ◽  
Additional Costs ◽  
The Rich ◽  
Display Location ◽  
Product Displays ◽  
Strategy Design ◽  
The Impact

Purpose of the research: Special product displays are expected to increase sales of the products they contain. Opposite to the rich existing literature on the impact of product in-store displays, we investigate the case of total product relocation instead of using the display location as an additional sales spot (secondary location strategy). Design/methodology: In our setting, products are fully taken off the usual shelf and put into special displays close to the checkout area. We use data from a field experiment conducted in 214 stores of a German perfumery chain, in which eight products were moved to an in-store display. Results/findings: Compared to the control group, the treated products placed in display boxes show a statistically significant increase in sales. The precise effect differs markedly between the investigated products, ranging from 80% to 478%. Accumulated sales increased by 217.69€ per week on average due to the installation of product displays. We can conclude that complete relocation, indeed, boosts sales, but the precise magnitude seems to be driven by factors not covered in this study. Practical implications and Conclusions: Based on the product selection, the results seem transferable to both other perfumery stores as well as general supermarkets. However, given the low additional revenues, retailers must consider all the additional costs associated with the implementation of product displays such as the costs of installing and maintaining the display, the costs of removing tags and rearranging the former shelf, and any opportunity costs. If these costs do not exceed the estimated effect, then the installation could be of economic importance.

scholarly journals Impact of community gardens on the sustainability of lifestyles: baseline data of the JArDinS study

2019 ◽  
Vol 29 (Supplement_4) ◽  
Author(s):  
M Tharrey ◽  
M Perignon ◽  
P Scheromm ◽  
C Mejean ◽  
N Darmon
Keyword(s):  
Food Supply ◽  
Natural Experiment ◽  
Community Gardens ◽  
Social Health ◽  
Control Group ◽  
Community Garden ◽  
Community Gardening ◽  
Sustainable Lifestyles ◽  
Quasi Experimental ◽  
The Impact

Abstract Introduction Despite growing evidence for the multiple health benefits of community gardening, longitudinal studies based on quantitative data are needed. JArDinS is a quasi-experimental study aimed at assessing the impact of community garden participation in the adoption of more sustainable lifestyles. Materials and Methods Gardeners starting gardening in a community garden in Montpellier (France) were recruited in 2018. Volunteers with no experience in community gardening and matched for age range, gender, household income and household composition were recruited in a control group. A recruitment goal of 80 participants per group was determined to detect a 30% increase in F&V supply in the gardeners group. Participant were issued with three tools: a Food Supply Dairy to collect data on monthly household’s food supply, a triaxial accelerometer to measure physical activity and an online questionnaire on mental and social health, sensitivity to food waste, and connection with nature. Measures have been collected at baseline and will be repeated 12 months later. Data collected are examined conjointly to assess the sustainability of lifestyles in its social/health, environmental and economic dimensions. Change of outcomes after 1 year will be compared between the natural experiment and the control groups, to evaluate the effect of access to a community garden on the sustainability of lifestyles. Results A final number of 77 participants per group were enrolled at baseline, which is 4% less the original recruitment goal. Baseline data for the natural experiment group and the control group are currently being analysed and will be presented. Discussion This study will provide valuable information about the potential of community gardens to favor sustainable lifestyles, based on a robust quasi-experimental design allowing causality evaluation. Findings could help developing policies toward more sustainable urban planning favoring both human and environmental health. Key messages For the first time, the JArDinS study will allow testing, the impact of community gardens on the sustainability of lifestyles. Results will help orient urban planning decisions towards healthier options.

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