Guns. Civilian ownership of firearms is a contentious political issue. We use national measures of firearm licenses and the total number of registered and restricted firearms collected by the Royal Canadian Mounted Police (RCMP) to revisit the relationships guns may have with homicides, suicides, and crime. Using fixed effects models at different geographic levels, we estimate the impacts of guns on deaths, suicides, and firearms-related crimes for urban Canada between 2013 and 2019. We find that increasing other-restricted guns (neither rifles nor handguns) by about 50 (per 100, 000) increases firearms-related deaths by about 0.1 (per 100, 000). Other-restricted guns are also increasing firearms-related deaths whose intent are classified as assaults or self-harms. Licenses are generally unrelated to the different firearms-related deaths. Effects of different firearms types and different licenses on firearms-related crimes are heterogeneous based on the different crimes considered. Many of our coefficient estimates are small in magnitude, suggesting large changes in guns or licenses in a heavily-related, Canadian context, would be necessary to reduce firearms-related deaths.COVID-19 and Labour Markets. In this paper, we study the effect of COVID-19 on the labour market and reported mental health of Canadians. To better I thank Tammy Schirle and Paul Peters for reading my thesis and their valuable comments.I am appreciative for the support from Carleton University throughout my time as a Ph.D. student.The Economics Department's staff, fellow students and faculty, filled me with camaraderie for which I am grateful.Dawn, Allison and Sabrina were a constant when I frequented the department. Our conversations were always a welcomed break from economics.Matt Strathearn welcomed me into the department through his generosity, be it his time or a coffee, and helped me get through the challenges with moving to a new city. Josh Brault and Florian Richard greatly brought me up to speed with all things "being an economist;" your peer effects were contagious. Debora Loccisano provided unbiased critiques of my carbonara. My friendship with Casey Pender was built on an academic foundation of loud disagreements over outrageous models and AeroPress-ed coffee; I look forward to more of that in the future.Conversations with Frances Woolley, Abel Brodeur, Thomas Russell, Jevan Cherniwchan and Chris Worswick, helped me become a better economist. While hard to see on observables, rest assured that your comments live in my head rentfree. Pat Coe was a welcomed bother who often guided me out of trouble and for whom I owe at least one case of beer.LP, your guidance throughout my Ph.D. research was indispensable. I admire the amount of time you devoted to me and your patience when faced with my stubbornness. I see myself developing into the kind of mentor that you were to me.Matt, I appreciate all that you have done for me. Beyond your professional support and mentorship, you have been an excellent friend. I am lucky to have had your help ...