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    Peripheral developer participation in open source projects: An empirical analysis
    (ACM, 2016-01) Krishnamurthy, R.; Jacob, V.; Radhakrishnan, S.; Doğan, Kutsal; Management Information Systems; DOĞAN, Kutsal
    The success of the Open Source model of software development depends on the voluntary participation of external developers (the peripheral developers), a group that can have distinct motivations from that of project founders (the core developers). In this study, we examine peripheral developer participation by empirically examining approximately 2,600 open source projects. In particular, we hypothesize that peripheral developer participation is higher when the potential for building reputation by gaining recognition from project stakeholders is higher. We consider recognition by internal stakeholders (such as core developers) and external stakeholders (such as end-users and peers). We find a positive association between peripheral developer participation and the potential of stakeholder recognition after controlling for bug reports, feature requests, and other key factors. Our findings provide important insights for OSS founders and corporate managers for open sourcing or OSS adoption decisions.
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    Capacitated strategic assortment planning under explicit demand substitution
    (Elsevier, 2021-11-01) Çömez-Dolgan, Nagihan; Fescioglu-Unver, N.; Cephe, E.; Şen, A.; Management Information Systems; ÇÖMEZ DOLGAN, Nagihan
    Buyers have easier access to a variety of products with the rise of multi-channel distribution strategies and the increase in new product introductions. On the other hand, firms experience greater pressure in offering the correct product variety given that the manufacturing infrastructure often imposes physical and financial constraints in attaining variety. This study examines a firm's optimal assortment planning problem under an exogenous demand model, where each customer has a predetermined preference for each product from a potential set. Proportional demand substitutions are allowed from out-of-assortment products to those available. We show that the problem is NP-complete. We also show that an optimal assortment is composed of some number of the highest margin products, if one product having a higher margin than another implies that the former product has a lower demand rate than the latter. The firm's assortment capacity is fully utilized at the optimum if the customers’ substitution ratio does not exceed a particular threshold. We also introduce several approximate assortment policies that can be easily implemented, and test these policies through extensive numerical analyses. The results reveal that some of the policies can provide less than a 1% profit gap with an optimal solution for a 20-product set. The policy's performance highly depends on the firm's assortment capacity-to-product set size ratio. Moreover, we provide performance bounds for two of these well-performing approximate policies.
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    A buyer-vendor system with untimely delivery costs: Traditional coordination vs. VMI with consignment stock
    (Elsevier, 2021-04) Çömez-Dolgan, Nagihan; Moussawi-Haidar, L.; Jaber, M. Y.; Management Information Systems; ÇÖMEZ DOLGAN, Nagihan
    This paper investigates the impact of coordinating a two-level supply chain that consists of a single-vendor and a single-buyer in the presence of untimely delivery costs. Specifically, early and late deliveries outside an agreed-upon delivery window are penalized. We investigate the replenishment policies of the vendor and the buyer with and without coordination. We show that untimely deliveries increase the replenishment cycle of the buyer, whether it coordinates with the vendor or not. More importantly, under untimely deliveries, coordination has a noticeable impact on aligning the decisions of both players, which is shown to be much more valuable in decreasing total costs. Implementing a coordinated solution becomes beneficial when the vendor's penalty and holding costs are high, the delivery window is narrow, and the buyer's holding and ordering costs are low. Next, we compare the traditional replenishment coordination mechanism with a vendor-managed-inventory (VMI) mechanism with consignment stock (CS) under untimely deliveries. We compare two coordination mechanisms, VMI-CS and traditional, and show that VMI-CS outperforms the other when the delivery times are random, but not so when the conditions are deterministic.
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    Knowledge transfer to aid social coding: The case of Stack Overflow
    (Elsevier, 2024-04) Temizkan, Orçun; Kumar, R. L.; Management Information Systems; TEMİZKAN, Orçun
    Focused online question and answer (Q&A) communities aid social coding. Despite the growing importance of social coding, knowledge transfer in this context remains under-researched. Our primary objective is to understand the knowledge transfer process in this context. We conceptualize knowledge transfer as a process that is impacted by the prior knowledge transfer interactions (network) among participants and is augmented by gamification. We argue that social capital resulting from prior knowledge transfer network interactions impact answer quality. Moreover, we also argue that the relationship between social capital and answer quality is moderated by the complexity of the knowledge transferred. Hence, our models draw from multiple related research streams: online communities, knowledge transfer, social capital, and gamification. These models are empirically tested using data from Stack Overflow (SO), a popular online Q&A community that aids social coding. Our results help to understand knowledge transfer in Q&A communities that aid social coding. Moreover, our results have implications for research on other types of Q&A communities and can inform development of platforms to support online communities.
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    Partnering for prosperity: Small IT vendor partnership formation and the establishment of partner pools
    (Taylor & Francis, 2021-03-04) Fındıkoğlu, Melike Nur; Ranganathan, C.; Watson-Manheim, M. B.; Management Information Systems; FINDIKOĞLU, Melike Nur
    Small IT vendors increasingly establish intra-industry collaborative arrangements with other technology providers. Despite the criticality of this strategy, there is little research that provides insights into partnership formation. Our study attempts to close this gap.Building on resource dependency theory (RDT) and resource-based view (RBV), we posit that, depending on external market and internal resource considerations, small IT vendors either supplement or complement their IT resources and capabilities via partnerships. When seeking to expand the scope of their resource portfolio by accessing dissimilar resources, vendors are engage in complementary partnerships (goal: improving the scope of IT resources). However, if they seek to expand the scale of their portfolio, they engage in supplementary partnerships (goal: extending the scale of IT resources). Using a qualitative approach, we examine the partnership formation practices of seven small IT firms. We propose a conceptual framework with five constructs that illustrate dynamics underlying these IT service partnerships, i.e., External market considerations, Internal resource configurations, Partner considerations, Partnership exploration, and Partnership development. We find variations in partnership practices depending on the supplementary or complementary nature of resources being sought. We also find small IT vendors form and manage partner pools to mitigate risks associated with partnerships.
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    ArticlePublicationOpen Access
    Who should practice price discrimination using rebates in an asymmetric duopoly?
    (Springer Science+Business Media, 2010-03) Doğan, Kutsal; Haruvy, E.; Rao, R. C.; Management Information Systems; DOĞAN, Kutsal
    Price discrimination is generally thought to improve firm profits by allowing firms to extract more consumer surplus. In competition, however, price discrimination may also be costly to the firm because restrictive incentive compatibility conditions may allow the competing firm to gain market share at the discriminating firm’s expense. Therefore, with asymmetric competition, it may be the case that one firm would let the other firm assume the burden of price discrimination. We investigate optimal segmentation in a market with two asymmetric firms and two heterogeneous consumer segments that differ in the importance of price and product attributes. In particular, we investigate second-degree price discrimination under competition with explicit incentive compatibility constraints thus extending prior work in marketing and economics. Focusing on the managerial implications, we explore whether it would be profitable for either or both firms to pursue a segmentation strategy using rebates as a mechanism. We identify conditions under which one or both firms would want to pursue such segmentation. We find that segmentation lessens competition for the less price-sensitive consumer segment and that this results in higher profits to both firms. A key to understanding this result is that segmentation leads to consumer remixing. We establish the key result that if firms are asymmetric in their attractiveness to consumers, the disadvantaged firm in our model is more likely to pursue a segmentation strategy than its rival in equilibrium. We then ask whether this result prevails in practice. To this end, we explore competitive segmentation empirically and are able to verify that disadvantaged firms indeed pursue segmentation through rebates with greater likelihood.
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    Setting the right incentives for global planning and operations
    (Elsevier, 2016-09-01) Norde, H.; Özen, Ulaş; Slikker, M.; Management Information Systems; ÖZEN, Ulaş
    We study incentive issues seen in a firm performing global planning and manufacturing, and local demand management. The stochastic demands in local markets are best observed by the regional business units, and the firm relies on the business units' forecasts for planning of global manufacturing operations. We propose a class of performance evaluation schemes that induce the business units to reveal their private demand information truthfully by turning the business units' demand revelation game into a potential game with truth telling being a potential maximizer, an appealing refinement of Nash equilibrium. Moreover, these cooperative performance evaluation schemes satisfy several essential fairness notions. After analyzing the characteristics of several performance evaluation schemes in this class, we extend our analysis to include the impact of effort on demand.
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    Group identity in markets
    (Elsevier, 2011-01) Li, S. X.; Doğan, Kutsal; Haruvy, E.; Management Information Systems; DOĞAN, Kutsal
    We present a laboratory experiment that measures the effects of group identity—one's perceived membership in social groups—on market transactions in an oligopoly market with a few sellers and buyers. We artificially induce group identity using art preferences and college majors in different treatments, respectively. Subjects are randomly assigned into the roles of buyers and sellers and interact repeatedly. We find that the presence of groups influences both the selection of trading partners and the determination of prices. All else equal, sellers are more likely to make offers to ingroup buyers, and the buyers are more likely to accept offers from ingroup sellers. There are considerable intergroup price differentials with the outgroup sellers charging a lower price than the ingroup sellers.
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    Competitive implications of software open-sourcing
    (Elsevier, 2012-12) Asundi, J.; Carare, O.; Doğan, Kutsal; Management Information Systems; DOĞAN, Kutsal
    This paper is concerned with the economic trade-offs associated with open-sourcing, the business strategy of releasing free open-source versions of commercial software products. The effect of the release of open-source versions on the customers’ perception of products is an important determinant of open-sourcing outcomes. We model open-sourcing as a strategic option for firms that compete in the market for software products. Of particular importance in our model is the effect of open-sourcing on customer values and the possibility for better customization offered by the open-source products. We show that open-sourcing can arise as an equilibrium outcome in our simple two-stage game. If the enhancement of customer values from open-sourcing is moderate or high, firms may find it optimal to release open-source versions of their products.
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    Economic models of sponsored content in wireless networks with uncertain demand
    (Wiley, 2014-09-09) Andrews, M.; Özen, Ulaş; Reiman, M. I.; Wang, Q.; Management Information Systems; ÖZEN, Ulaş
    This chapter evaluates an approach whereby the service provider can tap into an alternative source of revenue, originating from sales of advertisements or products and channelled by the content provider in the form of sponsorship of viewing. It presents a simple economic model in which service provider congestion costs, end user (EU) bandwidth costs, and the price that the content provider must pay for sponsoring content are all determined on a per-byte basis. A key feature of the model is that the content has uncertain demand. The chapter focuses on the relationship between the service provider and a single content provider. It also presents a numerical example to demonstrate how the optimization might work in practice. The chapter indicates how the results can be adapted for the case of EU quotas. In most current wireless data plans, the EUs pay a certain fee for a fixed quota of data.