Research

Publications


Alva O. Ferdinand, Ammar Aftab, Marvellous A. Akinlotan, “Texting-While-Driving Bans and Motor Vehicle Crash–Related Emergency Department Visits in 16 US States: 2007–2014”, American Journal of Public Health 109, no. 5 (May 1, 2019): pp. 748- 754. - Download PDF


Malik, K. Z., Ali, S. Z., Imtiaz, A., Aftab, A., (2019). “Preference Shocks in an RBC Model with Intangible Capital. Cogent Economics & Finance, 7(1), 1586621. - Download PDF


Appiah, B., Burdine, J., Aftab, A., Asamoah-Akuoko, L., Anum, D., Kretchy, I., Samman, E., Appiah, P., Bates, I., (2018). Determinants of intention to use mobile phone caller tunes to promote voluntary blood donation. JMIR mHealth and uHealth, 6(5), e117. - Download PDF


Aftab, A. et. al. “Pakistan Reviving Growth through Competitiveness”. Country Diagnostic Study, Asian Development Bank, December 2020. - Download PDF


Aftab, A. et. al. “An Actuarial Model for Costing Universal Health Coverage in Armenia”. Asian Development Bank, December 2020. - Download PDF


Aftab, A. et. al. “An Updated Assessment of the Economic Impact of COVID-19”. No. 133 ADB Briefs, Asian Development Bank, May 2020. - Download PDF


Working Papers


“Marijuana Legalization & Pediatric Exposures: A Quasi-Experimental Design”

(with Michael A. Morrisey and Robert L. Ohsfeldt)

Since the legalization of marijuana, number of underage children inadvertently having access to marijuana in edible forms (brownies, candies, etc.) has increased and is evident from the increase in marijuana poisoning among children. We curated data from HCUP (Healthcare Cost and Utilization) SEDD (State Emergency Department Databases) & SID (State Inpatient Databases) to compile information on number of marijuana poisoning cases in children. Treatment states were those that had legalized recreational and/or medicinal marijuana, and control states that have not legalized. Our paper implemented a quasi-experimental design to estimate the policy effect for both recreational and medical legalization on pediatric poisoning. Our estimates suggest that medical marijuana legalization is associated with significant increase of 12.2% in pediatric exposures, and recreational is associated with an increase of 19.9%.


“Same-Sex Marriage Law and Sexually Transmitted Infections”

(with Michael A. Morrisey and Robert L. Ohsfeldt)

In June 2015, Supreme Court of the United States ruled in favor of legal recognition for same-sex marriages. Prior to that, states had adopted their own rules. Such variation in same-sex marriage laws allows us to use a difference-in-difference model to examine the impact of legalization on STI cases. Past reports in medical and social science literature have suggested that legal recognition of same-sex marriage has had positive effects on health status of LGBTQ community in terms of improved access and quality of care. We have not been able to find any research that looked specifically at the policy impact on STIs related visits across multiple states, over time. Our study used HCUP SID & SEDD data to separate cases with STIs using ICD-9 & ICD-10 codes. Study findings indicate that legalization is associated with a significant decrease of 6.1% for all cases, and of 8.5% for 18-24 age cohort.


“Impact of Gun Policy on Mass Shootings Related Fatalities & Injuries”

(with Michael A. Morrisey and Robert L. Ohsfeldt)

Past research on firearm related deaths and injuries, particularly associated with mass shootings in the United States is extremely limited. To our knowledge, this is the first paper to look at the impact of gun policy on mass shooting related injuries and fatalities. More importantly, it does not analyze the usual gun policy variables (open carry, concealed carry, etc.) as they are not related to mass shootings. It focuses on issues like domestic violence, mental health, assault weapon ban, lost or stolen reporting, child access prevention, universal background check, and gun shows. Since financial and economic factors could also play a role in mass shootings, the study controls for population and per capita income, while unemployment rate is included as a key macroeconomic variable. A Negative Binomial difference-in-difference research design was implemented. Results show that higher unemployment rate is associated with a significant increase in mass shooting related fatalities and injuries. Furthermore, states that required reporting of individuals with history of mental illness to the National Instant Criminal Background Check System were associated with a significant decrease in occurrence of mass shooting incidents.


Peer Reviewed Conference Proceedings & Posters


Ferdinand, A., Aftab, A. State Texting-While-Driving Bans and their Impact on Motor Vehicle Crash-Related Emergency Department Visits. Oral presentation at the American Public Health Association Annual Meeting, 2018, San Diego, CA.

Ferdinand, A., Aftab, A. State Texting-While-Driving Bans and their Impact on Motor Vehicle Crash-Related Emergency Department Visits. Oral presentation at the AcademyHealth Annual Research Meeting, 2018, Seattle, WA.

Ferdinand, A., Morrisey, M., Aftab, A. The Great Recession, Gas Prices, Regulation, and Motor Vehicle Fatalities Involving Commercial Vehicles. Poster presented at the AcademyHealth Annual Research Meeting, 2016, Boston, MA.


Grants, Contracts, and Funded Research


Project Title: Examining the Impact of Gun Control Laws on Firearm-Related Morbidity and Mortality

Funded by the Texas A&M University School of Public Health (Total Funding: $25,000)

Role: Co-Investigator