Category Archives: Working Papers

Strategic Competitive Positioning: A Structural Hole-based Firm Measure

Lee, Myunghwan, Gene Moo Lee, Hasan Cavusoglu, Marc-David L. Seidel. “Strategic Competitive Positioning: A Structural Hole-based Firm Measure”, Working Paper.

In this research method paper, we propose a firm-specific strategic competitive positioning (SCP) measure to capture a firm’s unique competitive and strategic positioning. Using an unsupervised machine learning approach, we use structural holes, a concept in network theory, to develop and operationalize an SCP measure derived from a strategic similarity matrix of all existing U.S. publicly traded firms. This enables us to construct a robust firm-level measure of strategic competitive positioning with minimal human intervention. Our measure dynamically captures competitive positioning across different firms and years without using artificially bounded industry classification systems. We illustrate how the measure dynamically captures firm-level, industry-level, and cross-industry strategic changes. Then we demonstrate the effectiveness of our measure with an illustrative analysis showing the subsequent performance imprinting effect of SCP at the time of initial public offering (IPO). The results show that our unsupervised SCP measure predicts post-IPO performance. This paper makes a significant methodological contribution to the information systems and strategic management literature by proposing a network theory-based approach to dynamically measure firm-level strategic competitive positioning. The measure can be easily applied to firm-specific, industry-level, and cross-industry research questions across a wide variety of fields and contexts.

IT Risk and Stock Price Crashes (Working Paper)

Song, Victor, Hasan Cavusoglu, Gene Moo Lee, Mary L. Z. Ma (2021) “IT Risk and Stock Price Crashes,” Under Review. [HICSS version]

As firms increasingly depend on Information Technology (IT) in their business strategies and value creation activities, risks associated with IT have become one of the top concerns for managers and investors. This study examines the relation between IT-related risk factor information in Item 1A of the 10-K annual reports and a firm’s stock price crash risk, a firm-specific propensity to stock price crashes. Using the text-mining approach of Latent Dirichlet Allocation topic modeling to identify IT-related risk factors, we find that IT risk emerges as one of the firms’ key risk factors and that IT risk is positively associated with a firm’s future stock price crash risk. We further separate IT risk factors into cybersecurity risk that potentially leads to a loss or leak of data, and IT value risk that relates to a firm’s reliance on IT for its competitive advantage and value creation activities. We find that cybersecurity risk continues to affect crash risk, but IT value risk does not, consistent with their different risk natures. We also find that the readability, novelty, and the order of appearance of the IT risk factor information, specifically cybersecurity risk, in Item 1A enhance the information content of risk factors and strengthen their relation with stock price crash risk.

Predicting Litigation Risk via Machine Learning

Lee, Gene Moo*, James Naughton*, Xin Zheng*, Dexin Zhou* (2020) “Predicting Litigation Risk via Machine Learning,” Working Paper. [SSRN] (* equal contribution)

This study examines whether and how machine learning techniques can improve the prediction of litigation risk relative to the traditional logistic regression model. Existing litigation literature has no consensus on a predictive model. Additionally, the evaluation of litigation model performance is ad hoc. We use five popular machine learning techniques to predict litigation risk and benchmark their performance against the logistic regression model in Kim and Skinner (2012). Our results show that machine learning techniques can significantly improve the predictability of litigation risk. We identify two best-performing methods (random forest and convolutional neural networks) and rank the importance of predictors. Additionally, we show that models using economically-motivated ratio variables perform better than models using raw variables. Overall, our results suggest that the joint consideration of economically-meaningful predictors and machine learning techniques maximize the improvement of predictive litigation models.

Security Defense against Long-term and Stealthy Cyberattacks (Working Paper)

Kookyoung Han, Choi, Jin Hyuk, Yun-Sik Choi, Gene Moo Lee, Andrew B. Whinston (2021) “Security Defense against Long-term and Stealthy Cyberattacks”. Under Review.

  • Latest version: Dec 2021
  • Funded by NSF (Award #1718600) and UNIST
  • Best Paper Award at KrAIS 2017
  • Presented at UT Austin (2017), UNIST (2017), INFORMS (Houston, TX 2017), CIST (Houston, TX 2017), WITS (Seoul, Korea 2017), and KrAIS (Seoul, Korea 2017)
  • Previous titles:
    • Misinformation and Optimal Time to Detect
    • Optimal Stopping and Strategic Espionage
    • To Disconnect or Not: A Cybersecurity Game

Modern cyberattacks such as advanced persistent threats have become sophisticated. Hackers can stay undetected for an extended time and defenders do not have sufficient countermeasures to prevent advanced cyberattacks. Reflecting on this phenomenon, we propose a game-theoretic model in which a hacker launches stealthy cyberattacks for a long time and a defender’s actions are to monitor the activities and to disable a suspicious user. Damages caused by the hacker can be enormous if the defender does not immediately ban a suspicious user under certain circumstances, which can explain the emerging sophisticated cyberattacks with detrimental consequences. Our model also predicts that the hacker may opt to be behavioral to avoid the worst cases. This is because behavioral cyberattacks are less threatening and the defender decides not to immediately block a suspicious user to reduce the cost of false detection.

On the Spillover Effects of Online Product Reviews on Purchases: Evidence from Clickstream Data (ISR 2021)

Kwark, Young.*, Gene Moo Lee*, Paul A. Pavlou*, Liangfei Qiu* (2021) “On the Spillover Effects of Online Product Reviews on Purchases: Evidence from Clickstream Data“. Information Systems Research 32(3): 895-913. (* equal contribution)

  • Data awarded by Wharton Consumer Analytics Initiative
  • Presented in WCBI (Snowbird, UT 2015), KMIS (Busan, Korea 2016), Minnesota (2016), ICIS (Dublin, Ireland 2016), Boston Univ. (2017), HEC Paris (2017), and Korea Univ. (2018)
  • An earlier version was published in ICIS 2016
  • Research assistants: Bolat Khojayev, Raymond Situ

We study the spillover effects of the online reviews of other covisited products on the purchases of a focal product using clickstream data from a large retailer. The proposed spillover effects are moderated by (a) whether the related (covisited) products are complementary or substitutive, (b) the choice of media channel (mobile or personal computer (PC)) used, (c) whether the related products are from the same or a different brand, (d) consumer experience, and (e) the variance of the review ratings. To identify complementary and substitutive products, we develop supervised machine-learning models based on product characteristics, such as product category and brand, and novel text-based similarity measures. We train and validate the machine-learning models using product pair labels from Amazon Mechanical Turk. Our results show that the mean rating of substitutive (complementary) products has a negative (positive) effect on purchasing of the focal product. Interestingly, the magnitude of the spillover effects of the mean ratings of covisited (substitutive and complementary) products is significantly larger than the effects on the focal product, especially for complementary products. The spillover effect of ratings is stronger for consumers who use mobile devices versus PCs. We find the negative effect of the mean ratings of substitutive products across different brands on purchasing of a focal product to be significantly higher than within the same brand. Lastly, the effect of the mean ratings is stronger for less experienced consumers and for ratings with lower variance. We discuss implications on leveraging the spillover effect of the online product reviews of related products to encourage online purchases.