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Addressing endogeneity can be a challenging task given the different sources of endogeneity and their impacts on empirical results. While premier business journals typically expect authors to rigorously address endogeneity, this expectation is relatively new to many Operations Management (OM) scholars, as exemplified by a recent editorial in Journal of Operations Management that calls for more rigorous treatment for endogeneity. This study serves two purposes. First, we summarize recent OM literature with respect to the treatment for endogeneity by reviewing studies published in leading OM journals between 2012 and 2017. The review provides evidence that endogeneity problems have received increasing attention from OM scholars. However, we also find some common problems that may render the chosen techniques for addressing endogeneity less effective and potentially lead to biased analysis results. Second, since instrumental variable regression is the most prevalent technique for dealing with endogeneity in the OM literature according to our review, we provide an empirical illustration tailored to OM researchers for using instrumental variable regression in the post‐design (data analysis) phase. Using variables from a publicly available healthcare dataset, our analysis sheds light on the importance of examining instruments' quality and triangulating results based on more than one test/estimator.

Focusing on organizational learning research in healthcare settings, this paper studies how experience, ownership and focus affect productive efficiency in U.S. hospitals. Building on organizational learning theory, health economics and the focused factory concept, we propose that hospitals learn to improve productive efficiency and the relationship between productive efficiency and cumulative experience is curvilinear. We also hypothesize that clinical focus has a positive effect on productive efficiency and that nonprofit hospitals and proprietary hospitals trade off costs and quality differently. The proposed hypotheses are tested with yearly performance data for over 3700 major U.S. hospitals spanning from 1996 to 2010. We find strong support for the proposed hypotheses.

Purpose Purpose-The application of self-service technology in transaction-based e-service (e.g. online financial services) creates a challenge for firms: what combination of features should they offer to satisfy needs from different customer segments? This paper seeks to address the above question by highlighting similarities and differences of consumer preferences among self-service, hybrid service and professional service segments for online financial services. Design/methodology/approach Design/methodology/approach-This study employs a web-based discrete choice experiment, in which 1,319 consumers were offered different account alternatives, which include features for self-service and professional assistance, price per transaction, and promotion offers. Findings Findings-The results demonstrate that overall, consumer preferences for features of online financial services differ across segments. Moreover, with the variation in the strength of self-reliance, interesting trends regarding the relative importance of features are observed. With the given customer segments, this study also identifies several demographic features with significant effects on the choice of service alternatives through a multinomial logistic model. Originality/value Originality/value-The authors believe that these results have both managerial and research implications for design and operations strategy formulation for online financial services.

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While service design and process management have received research attention in the past, there is limited empirical work examining both factors in the hospital setting. Through operationalizing focus as a service design approach and quality improvement (QI) initiatives as process management efforts, we hypothesize that focus and QI initiatives affect clinical quality both individually and collectively. Utilizing heart attack procedures as the study context, we examine a set of hypotheses based on a panel dataset consisted of 201 hospitals from 2005 to 2011 in the state of Florida. After accounting for potential lag effects and endogeneity biases, we find empirical support to the proposed hypotheses.

Prior research examines customer satisfaction in retailing and e-commerce settings, yet online financial services have received little research attention. To understand customer satisfaction with this fastgrowing service, this study investigates the role of flow experience, a sensation that occurs as a result of significant cognitive involvement. The study examines how service system characteristics affect the cognitive states of the flow experience, which determines customer satisfaction. The flow construct and total experience design suggest a structural model that is empirically tested using responses from a large sample of online investors. In support of the model and most of the hypotheses it suggests, the empirical results clarify the important antecedents and consequence of flow experience in online financial services and suggest the viability of using a dual-layer experience construct to investigate customer satisfaction. These findings can help researchers and service providers understand when, where, and how flow experience is formulated in online financial services.

We examine the longitudinal impact of service mix on cost efficiency in U.S. acute care general hospitals. We propose two different dimensions of service mix, with the first dimension capturing internal emphasis on specific service lines (i.e., specialization) and the second dimension reflecting the deviation of a hospital from the average level of specialization for hospitals in the same service area (i.e., differentiation). We hypothesize that as the level of a hospital's specialization increases, hospital cost efficiency should improve at a decreasing rate. We also hypothesize that differentiation helps improve cost efficiency in competitive markets. Lastly, we examine whether acute care general hospitals can use service mix as an operational lever to improve cost efficiency when specialty hospitals are present in the same local markets. We find strong empirical support for the hypothesized relationships.