The initial period of vaccination shows strong heterogeneity between countries’ vaccinations rollout, both in the terms start process and dynamics number people that are vaccinated. A predominant thesis ongoing debate on drivers this observed is a key determinant swift extensive vaccine rollout state capacity. Here, we utilize two measures quantify different aspects capacity: i) external capaci...

this study redescribes an arthroscopic bridge technique for repair of avulsion of the posterior cruciate ligament. the procedure is performed step-to-step. in this technique we created two bone tunnels in the anterior aspect of the tibia and inferior medial of the tibia tuberosity and then create suture fixation of the fragment using the suture bridge. the arthroscopic bridge technique was used...

Heckman advocates an approach to causal inference that draws upon structural modeling of the outcome(s) of interest (which he calls scientific), and he contrasts this approach sharply with that arising out of the statistical literature on experimentation. Drawing extensively on several previous papers—for example, Heckman (1997, 2000, 2001) and Heckman and Navarro-Lozano (2004)—Heckman goes eve...