Essays on Social, Healthcare, and Digital Operations Open Access

Abstract

This dissertation includes three essays, each focusing on an important element of my research. The first essay explores a long-standing societal issue, gender inequality. In particular, the essay addresses how working from home during the COVID pandemic lockdown impacted the productivity of male and female academic researchers differently. The second essay focuses on healthcare operations. In particular, we develop a new framework to study state- and time-dependent service processes in healthcare. The third essay is on platform and digital operations. We study how business buyers in the Business-to-Business (B2B) leverage online reviews strategically on B2B trading platforms.

Table of Contents

LIST OF TABLES AND FIGURES for Essay I

List of Figures

1 Time Trends of US Preprints from December 2019 to May 2020 . . . . . . . . . . . . E1 – 10

2 Impact of Lockdown on Gender Inequality across Countries . . . . . . . . . . . . . . E1 – 16

A.1 Time Trends of US Preprints from December 2018 to May 2019 . . . . . . . . . . . . E1 – 26

List of Tables

1 Summary Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E1 – 12

2 Impact of Lockdown on Gender Inequality with the Discipline Fixed Effect . . . . . E1 – 13

3 Impact of Lockdown on Gender Inequality in Aggregation . . . . . . . . . . . . . . . E1 – 14

4 Impact of Lockdown on Gender Inequality by Academic Ranks . . . . . . . . . . . . E1 – 14

5 Impact of Lockdown on Gender Inequality by University Ranking . . . . . . . . . . . E1 – 15

6 Impact of Lockdown on Abstract Views . . . . . . . . . . . . . . . . . . . . . . . . . E1 – 18

7 Impact of Lockdown on Downloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . E1 – 18

8

Impact of Lockdown on Gender Inequality among All-male and All-female Preprints E1 – 19

9 Impact of Lockdown on Gender Inequality Using the Balanced Panel . . . . . . . . . E1 – 20

A.1 Robustness to Different University Rankings . . . . . . . . . . . . . . . . . . . . . . E1 – 27

A.2 Parallel Trends Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E1 – 28

A.3 Impact of Lockdown on Gender Inequality by Academic Ranks in Aggregation . . . E1 – 28

A.4 Impact of Lockdown on Gender Inequality among All Male or All Female Preprints

in Aggregation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E1 – 29

A.5 Summary Statistics for December 2018 - May 2019 . . . . . . . . . . . . . . . . . . . E1 – 29

A.6 Falsification Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E1 – 30

A.7 Summary Statistics for Downloads and Abstract Views . . . . . . . . . . . . . . . . E1 – 30

A.8 Impact of Lockdown on Abstract Views . . . . . . . . . . . . . . . . . . . . . . . . . E1 – 30

A.9 Impact of Lockdown on Downloads . . . . . . . . . . . . . . . . . . . . . . . . . . . . E1 – 30

LIST OF TABLES AND FIGURES for Essay II

List of Figures

1 A stylized service process. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E2 – 12

2 An Illustration of Workload Measure . . . . . . . . . . . . . . . . . . . . . . . . . . . E2 – 17

3 Curve of simulated average service time per patient . . . . . . . . . . . . . . . . . . . E2 – 26

4 Time-varying revenue trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E2 – 26

5 Static revenue trends . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E2 – 26

List of Tables

1 Workload Literature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E2 – 5

2 Static workload effects on patient LOS (w/o quadratic workload terms) . . . . . . . E2 – 19

3 Static workload effects on patient LOS (w/ quadratic workload terms) . . . . . . . . E2 – 19

4 Log-normal service rate estimation of (8) . . . . . . . . . . . . . . . . . . . . . . . . E2 – 21

5 Costs savings comparison across different specifications . . . . . . . . . . . . . . . . . E2 – 27

6 Costs savings comparison across different specifications . . . . . . . . . . . . . . . . . E2 – 27

LIST OF TABLES AND FIGURES for Essay III

List of Figures

1 Search Result of a Product . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E3 – 10

2 A Seller’s Page on Alibaba.com . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E3 – 11

3 Transaction History of a Seller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E3 – 12

4 Review History of a Seller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E3 – 13

5 Illustration of the DID Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . E3 – 19

List of Tables

1 Summary Statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E3 – 17

2 Impact of Online Reviews on B2B Sales . . . . . . . . . . . . . . . . . . . . . . . . . . E3 – 21

3 Impact of Sellers’ Recent Transaction Volumes on Buyers’ Review Probability . . . . E3 – 21

4 Impact of Sellers’ Recent Transaction Volumes on Buyers’ Review Ratings . . . . . . E3 – 22

5 Negative Reviews and Repeat Purchase . . . . . . . . . . . . . . . . . . . . . . . . . . E3 – 23

6 Falsification Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . E3 – 24

7 Temporal Trend Not Affecting the Results . . . . . . . . . . . . . . . . . . . . . . . . E3 – 25

8 Impact of Sellers’ Recent Transaction Value on Buyers’ Review Probability . . . . . . E3 – 26

About this Dissertation

Rights statement

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School	Laney Graduate School
Department	Business
Subfield / Discipline	Information Systems & Operations Management
Degree	Ph.D.
Submission	Dissertation
Language	English
Research Field	Operations Research
Keyword	Healthcare Operations Social Operations
Committee Chair / Thesis Advisor	Ruomeng Cui, Emory University
Committee Members	Donald Lee, Emory University Daniel McCarthy, Emory University Feng Zhu, Harvard Business School, Harvard University Achal Bassamboo, Kellogg School of Management, Northwestern University

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