<div><div> <p>2019年1月3日，嫦娥四号成功登陆月球表面，传回世界第一张近距离拍摄月背影像图；2019年1月4日，天津大学管理与经济学部2018年度经管榜样颁奖典礼成功举行。2019，经管追梦人依旧前行！来看看下一周都有哪些令人期待的精彩活动吧！</p> <p>学术活动</p> <p><span><strong><span>1.</span></strong></span></p> <p>活动时间：2019年1月9日（周三）9:30-11:30</p> <p><span><strong><span>2.</span></strong></span></p> <p>活动地点：天津大学第25教学楼C412</p> <p><span><strong><span>3.</span></strong></span></p> <p>活动主题：APP的溢出效应测量：基于因果图算法 How Mega is the Mega?<span>Measuring the Spillover Effects of WeChat by Machine Learning and Econometrics</span></p> <p><span><strong><span>4.</span></strong></span></p> <p>活动内容：</p> <p>WeChat, an instant messaging APP, is considered a mega APP due to its dominance in terms of use among Chinese smartphone users. Little is known, however, about its externality in the broaderAPPmarket. This work estimates the spillover effects of WeChat on the other Top-50 most frequently used APPs in China, using users’ weeklyAPPusage data. Given the challenge of determining causal inference from observational data, we apply a graphical model and an econometric method to estimate the spillover effects in two steps: (1) we determine the causal structure by estimating a partially ancestral diagram, using a Fast Causal Inference (FCI) algorithm; and (2) given the causal structure, we find a valid adjustment set and estimate the causal effects by an econometric model with the adjustment set for controlling non-causal effects. Our findings show that the spillover effects of WeChat are limited; in fact, only two otherAPPs, Tencent News and Taobao, receive positive spillover effects from WeChat. In addition, we show that, if researchers fail to account for the causal structure that is determined from the graphical model, it is easy to fall into the trap of confounding bias and selection bias when estimating causal effects. The findings generate managerial implications in terms ofAPPusage patterns, strategic management of megaAPPs on anAPPplatform, andAPPpromotional strategies forAPPplatform managers andAPPdevelopers.</p> <p><span><strong><span>5.</span></strong></span></p> <p>主讲人介绍:</p> <img src="/uploads/image/2019/20190107/3c4ada937b6c1a6a48c2f30ca375c846.jpg"><p>窦一凡</p> <p>复旦大学管理学院信息管理与信息系统系副教授。2007年毕业于清华大学经管学院，获管理学学士学位；2012年毕业于清华大学经管学院管理科学工程专业，获管理学博士学位。窦一凡的主要研究兴趣是与信息产品相关的经济学问题，如信息产品的定价策略、平台模式的定价和协调问题等。窦一凡的研究工作先后发表</p> <p>校友活动</p> <p><span><strong><span>1.</span></strong></span></p> <p>活动时间：2019年1月12日（周六）15:00-21:00</p> <p><span><strong><span>2.</span></strong></span></p> <p>活动地点：深圳市南山区高北十六创意园里空间</p> <p><span><strong><span>3.</span></strong></span></p> <p>活动主题：天津大学深圳EMBA同学会2019年年会</p> <p><span><strong><span>4.</span></strong></span></p> <p>活动内容：</p> <p>此次活动由天津大学深圳EMBA同学会主办，因大部分深圳EMBA校友没有参加过学位授予仪式，EMBA深圳同学会特申请于2019年年会期间在深圳举行一次EMBA学位授予仪式，有60余院校友参加本次学位授予仪式。</p> <img src="/uploads/image/2019/20190107/e0e57e4c7efa13f28af2551a96f39702.jpg"><p>素材整理 / 蔡幼馨</p> <p>图文编辑 / 蔡幼馨</p> <img src="/uploads/image/2019/20190107/16d31b9767aa1df19f12e81e6d833e00.jpg"> </div></div>

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