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Gold, Silver, Bronze or Tin? The Short and Long Term Effects of Mega Sporting Events
Stephen P. Ferris,Sulgi Koo,Kwangwoo Park,David T. Yi 한국재무학회 2012 한국재무학회 학술대회 Vol.2012 No.05
This paper examines the short and long term effects of the Summer Olympics, Winter Olympics, and the World Cup on the economy of the hosting country. We find that the immediate effect of such an announcement on equity market returns is statistically insignificant, with the construction industry being the only exception. We further show that mega sports events generally fail to provide significant positive long-term stock market performance to the hosting country. We do however find that the Summer Olympic game hosting nations generate significant positive economic performance up to 3 years prior to hosting the event, while this positive economic performance disappear after 1 year of the hosting the Summer Olympic game. Our results suggest that unlike the common claims of mega sports organizers, it appears that there are no significant long-run economic gains from hosting any of the three mega sporting events.
Elsa Iannicelli,Sara Di Renzo,Mario Ferri,Emanuela Pilozzi,Marco Di Girolamo,Alessandra Sapori,Vincenzo Ziparo,Vincenzo David 대한영상의학회 2014 Korean Journal of Radiology Vol.15 No.1
Objective: To evaluate the accuracy of magnetic resonance imaging (MRI) with lumen distention for rectal cancer staging and circumferential resection margin (CRM) involvement prediction. Materials and Methods: Seventy-three patients with primary rectal cancer underwent high-resolution MRI with a phasedarray coil performed using 60-80 mL room air rectal distention, 1-3 weeks before surgery. MRI results were compared to postoperative histopathological findings. The overall MRI T staging accuracy was calculated. CRM involvement prediction and the N staging, the accuracy, sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) were assessed for each T stage. The agreement between MRI and histological results was assessed using weighted-kappastatistics. Results: The overall MRI accuracy for T staging was 93.6% (k = 0.85). The accuracy, sensitivity, specificity, PPV and NPV for each T stage were as follows: 91.8%, 86.2%, 95.5%, 92.6% and 91.3% for the group ≤ T2; 90.4%, 94.6%, 86.1%, 87.5% and 94% for T3; 98,6%, 85.7%, 100%, 100% and 98.5% for T4, respectively. The predictive CRM accuracy was 94.5% (k =0.86); the sensitivity, specificity, PPV and NPV were 89.5%, 96.3%, 89.5%, and 96.3% respectively. The N staging accuracy was 68.49% (k = 0.4). Conclusion: MRI performed with rectal lumen distention has proved to be an effective technique both for rectal cancer staging and involved CRM predicting.
Charles S. Fuchs,Kei Muro,Jiri Tomasek,Eric Van Cutsem,조재용,오상철,Howard Safran,György Bodoky,Ian Chau,Yasuhiro Shimada,Salah-Eddin Al-Batran,Rodolfo Passalacqua,Atsushi Ohtsu,Michael Emig,David Ferry,Ku 대한위암학회 2017 Journal of gastric cancer Vol.17 No.2
The identified prognostic factors and the reported prognostic index may help clinical decision-making, patient stratification, and planning of future clinical studies.