At Columbia Business School, our faculty members are at the forefront of research in their respective fields, offering innovative ideas that directly impact the practice of business today. A quick glance at our publication on faculty research, CBS Insights, will give you a sense of the breadth and immediacy of the insight our professors provide.
As a student at the School, this will greatly enrich your education. In Columbia classrooms, you are at the cutting-edge of industry, studying the practices that others will later adopt and teach. As any business leader will tell you, in a competitive environment, being first puts you at a distinct advantage over your peers. Learn economic development from Ray Fisman, the Lambert Family Professor of Social Enterprise and a rising star in the field, or real estate from Chris Mayer, the Paul Milstein Professor of Real Estate, a renowned expert and frequent commentator on complex housing issues. This way, when you complete your degree, you'll be set up to succeed.
Columbia Business School in conjunction with the Office of the Dean provides its faculty, PhD students, and other research staff with resources and cutting edge tools and technology to help push the boundaries of business research.
Specifically, our goal is to seamlessly help faculty set up and execute their research programs. This includes, but is not limited to:
All these activities help to facilitate and streamline faculty research, and that of the doctoral students working with them.
The article offers the authors' views on expatriate management programs and the benefits from executives interacting with the people and institutions of the host country. The idea that international experience or interaction between foreign managers and local people will help managers become more creative, entrepreneurial, and successful is discussed. The concept of integrative complexity in bi-cultural managers which enhances job performance is mentioned.
The Kidney Case is multi-person exercise that involves the allocation of a single kidney. Students read profiles of eight candidates for the kidney and make a first allocation decision. Each candidate was designed to be high on some allocation principles but low or unknown on others (e.g., best, match, time in cue, age, personal responsibility for disease, future benefits to society, etc.). Then, students are put into groups and assigned to advocate for one of the candidates. Each group will prepare and give a 3-minute presentation on why their candidate should receive the kidney.
Emissions abatement alone cannot address the consequences of global warming for weather disasters. We model how society adapts to manage disaster risks to capital stock. Optimal adaptation — a mix of firm-level efforts and public spending — varies as society learns about the adverse consequences of global warming for disaster arrivals. Taxes on capital are needed alongside those on carbon to achieve the first best.
What are the sources of the returns to education? We study the allocation of higher education graduates from public institutions in Ohio across firms. We present three results. First, we confirm findings in the earlier literature of large pay differences across degrees. Second, we show that up to one quarter of pay premiums for higher degrees are explained by between-firm pay differences. Third, higher education degrees are associated with greater representation at the best-paying firms.
This article focuses on the role of threats in negotiations. Broadly speaking, a threat is a proposition that issues demands and warns of the costs of noncompliance. Even if neither party resorts to them, potential threats shadow most negotiations. Researchers have found that people actually evaluate their counterparts more favorably when they combine promises with threats rather than extend promises alone. Whereas promises encourage exploitation, the threat of punishment motivates cooperation.
What discount rate should the government use to measure the financial status of various government programs and the impact of potential policy changes? How, if at all, should the discount rate take into account the risk of the underlying cash flows? We examine these questions in the context of one of the largest components of the U.S. budget: Social Security. Official measures of the U.S. Social Security system's present value funding shortfall are computed using the risk-free interest rate.
This paper analyzes longitudinal state-level data during the period 1995–2004 to investigate whether use of newer prescription drugs has reduced the ratio of the number of workers receiving Social Security Disability Insurance benefits to the working-age population (the “DI recipiency rate”).
Nursing care is arguably the single biggest factor in both the cost of hospital care and patient satisfaction. Inadequate inpatient nursing levels have also been cited as a significant factor in medical errors and emergency room overcrowding. Yet, there is widespread dissatisfaction with the current methods of determining nurse staffing levels, including the most common one of using minimum nurse-to-patient ratios. In this paper, we represent the nursing system as a variable finite-source queuing model.
The ability of humans to display bodily expressions that contradict mental states is an important developmental adaptation. The authors propose that mind-body dissonance, which occurs when bodily displayed expressions contradict mentally experienced states, signals that the environment is unusual and that boundaries of cognitive categories should be expanded to embrace atypical exemplars. Four experiments found that mind-body dissonance increases a sense of incoherence and leads to category expansion.
Over the years, the level of analytical rigor has risen in articles published in marketing academic journals. While, ceteris paribus, rigor is desirable, there is a growing sense that rigor has become a, if not the, goal for research in marketing. Consequently, other desirable characteristics, such as relevance, communicability, and simplicity, have been downplayed, to the detriment of the field of marketing.
Theories of visionary leadership propose that groups bestow leadership on exceptional group members. In contrast, social identity perspectives claim that leadership arises, in part, from a person's ability to be seen as representative of the group. Integrating these perspectives, the authors propose that effective leaders often share group members' perspectives concerning the present, yet offer a unique and compelling vision for the group's future.
We analyze the computational problem of estimating financial risk in a nested simulation. In this approach, an outer simulation is used to generate financial scenarios and an inner simulation is used to estimate future portfolio values in each scenario. We focus on one risk measure, the probability of a large loss, and we propose a new algorithm to estimate this risk. Our algorithm sequentially allocates computational effort in the inner simulation based on marginal changes in the risk estimator in each scenario.
Extant research recognizes that firms exploit regulatory variations to their advantage but depicts such regulatory arbitrage as a dyadic process between firms and regulators. We extend this account by including the political rivals of a firm and suggest that firms view regulatory differences as part of a corporate political opportunity structure, and exploit regulatory variations to disadvantage their rivals. Empirically, we focus on variations in right-to-work (RTW) laws which signal the pro-business climate in a state and exist in twenty-two of the 50 American states.
The principal performance measures in an inventory system involve key characteristics of the system's inventory position, i.e., the total inventory the firm is economically committed to, as well as the average order size or order frequency. As to the former, the focus among operation managers is on the maximum inventory (position), the average inventory and the minimum inventory, the latter being related to the so-called safety stock concept. Financial analysts and macroeconomists pay particular attention to the sales/inventory ratio, also referred to as the inventory turnover.
Customer switching costs are an important factor in account-based services such as telecommunications, financial, insurance and brokerage services. In these businesses, existing customers incur significant costs if they switch to another provider. Such costs include physical configuration and installation costs, contractual costs (e.g. termination fees) and cognitive costs of learning. These switching costs enable a firm to extract more revenue from incumbent customers by charging them higher prices.
Asset-backed securitization transforms assets into securities and in the process separates the credit risk of a pool of assets from the credit risk of the securitization's sponsor, which gives securitization several important advantages over issuing corporate debt. Recent research, however, suggests a link between the financial condition of the sponsor and the performance of its ABS.
While the high savings rate in China has global impact, existing explanations are incomplete. This paper proposes a competitive saving motive as a new explanation: as the country experiences a rising sex ratio imbalance, the increased competition in the marriage market has induced the Chinese, especially parents with a son, to postpone consumption in favor of wealth accumulation. The pressure on savings spills over to other households through higher costs of house purchases. Both cross-regional and household-level evidence supports this hypothesis.
Scarcity has long been known to impact consumers' choices. Yet, the impact of shelf-based scarcity in retail environments, created by stocking level depletion, has received almost no attention in the literature. Indeed, little research to date has even examined if consumers will attend to shelf-based scarcity in retail environments, much less how this cue can impact choice. A priori, given the inherently noisy and cue-filled nature of retail environments, it is quite reasonable to expect that shelf-based scarcity would play little to no role in consumers' choices.
Past research recognizes that firms exploit regulatory variations to their advantage but depicts such regulatory arbitrage as a dyadic process between firms and regulators. We extend this account by including a firm’s non-market rivals and suggest that firms view regulatory differences as part of a corporate political opportunity structure and exploit regulatory variations to disadvantage their rivals. Empirically, we focus on variations in right-to-work (RTW) laws that signal the pro-business climate in a state; these laws exist in 22 U.S. states.
Capacity decisions in service operations often involve a trade-off between operating cost and the level of service offered to customers. Although the cost of attaining a pre-specified level of service has been well-studied, there isn't much research studying how customer service levels affect revenue and profit. This paper conducts an empirical study to analyze how waiting in a queue in the context of a retail store affects customer purchasing behavior. Our methodology uses a novel technology based on digital imaging to record periodic information about the queuing system.
This paper tests whether stock market investors appropriately distinguish new and old information about firms. I define the staleness of a news story as its textual similarity to the previous ten stories about the same firm. I find that firms' stock returns respond less to stale news. Even so, a firm's return on the day of stale news negatively predicts its return in the following week. Individual investors trade more aggressively on news when news is stale. The subsequent return reversal is significantly larger in stocks with above-average individual investor trading activity.
We address the following problems that arise in the management of call center operating under certain Service Level Agreements (SLAs): (1) setting the capacity levels of the agent pools; (2) constructing a routing scheme for arriving customers; and (3) devising a dynamic priority rule for customers waiting at each pool. We develop a mathematical programming approach to simultaneously solve this integrated planning problem and show how it can be used in strategic call center design studies.
Research examining both the organizing and activating effects of testosterone in one-shot bargaining contexts has been vexed by inconsistencies. Some research finds that high-testosterone men are more likely to reject unfair offers in an ultimatum game and exogenous administration of testosterone to men leads to less generous offers. In contrast, other research finds that higher prenatal exposure to testosterone predicts more generous dictator game offers and administering testosterone to women leads to more generous ultimatum game offers.
The etiology of generalized anxiety disorder (GAD), including its high degree of comorbidity with major depressive disorder (MDD), remains a conceptual and clinical challenge. In this article, we discuss the relevance of regulatory focus theory (Higgins, 1997), an increasingly influential theory of self-regulation, for generating and testing hypotheses regarding vulnerability to GAD as well as to GAD/MDD comorbidity. The theory postulates two cognitive/motivational systems for pursuing desired end states: the promotion and prevention systems.
We characterize the optimal mortgage contract in a continuous time setting with stochastic growth in house price and income, costly foreclosure, and a risky borrower who requires incentives to repay his debt. We show that many features of subprime loans can be consistent with properties of the optimal contract and that, when house prices decline, mortgage modification can create value for borrowers and lenders.
Historical studies reveal how organizational markets supplied artifacts that became fashionable because they met not only consumers' cultural tastes, but also their technological preferences. This article calls such artifacts cultural-technological fusions. The digital mode of production tends to generate more types of fashionable fusions, which replace each other at a growing rate, and travel increasingly swiftly across consumers globally.
Although people have been shown to rely on feelings to make judgments, the conditions that moderate this reliance have not been systematically reviewed and conceptually integrated. This article addresses this gap by jointly reviewing moderators of the reliance on both subtle affective feelings and cognitive feelings of ease-of-retrieval.
Although debates still rage over the causes of the financial crisis of 2007–2009, one thing is clear: several of the world's largest financial institutions — including Fannie Mae, Freddie Mac, Citigroup, UBS, AIG, Bear Stearns, Lehman Brothers, and Merrill Lynch — had amassed huge and concentrated asset risks relating to sub-prime mortgages and other risky investments, but they maintained equity capital that was too small to absorb the losses that resulted from those risky investments.
Beginning with Shimer (2005) and Hall(2005), a recent branch of the business cycle literature has explored the role of wage rigidity in accounting for the statistical characteristics of key labor market variables; in particular high vacancy and unemployment volatility and a high negative correlation between the two. As a further exploration, we extend the Mortensen-Pissarides structure of period-by-period Nash wage bargaining to an environment where there is labor force heterogeneity (permanently employed "insiders" and "outsiders" subject to separations) and limited asset market participat
A great deal of research in consumer decision-making and social-cognition has explored consumers’ attempts to simplify choices by bolstering their tentative choice candidate and/or denigrating the other alternatives. The present research investigates a diametrically opposed process, whereby consumers complicate their decisions.
This paper examines whether firms in noncompetitive industries benefit more from good governance than do firms in competitive industries. We find that weak governance firms have lower equity returns, worse operating performance, and lower firm value, but only in noncompetitive industries. When exploring the causes of the inefficiency, we find that weak governance firms have lower labor productivity and higher input costs, and make more value-destroying acquisitions, but, again, only in noncompetitive industries.
This paper studies the asset pricing implications of Bayesian learning about the parameters, states, and models determining aggregate consumption dynamics. Our approach is empirical and focuses on the quantitative implications of learning in real-time using post World War II consumption data. We characterize this learning process and provide empirical evidence that revisions in beliefs stemming from parameter and model uncertainty are significantly related to aggregate equity returns.
This paper provides evidence that lenders to a firm close to distress have incentives to coordinate: lower financing by one lender reduces firm creditworthiness and causes other lenders to reduce financing. To isolate the coordination channel from lenders' joint reaction to new information, we exploit a natural experiment that made lenders' negative private assessments about their borrowers public. We show that lenders, while learning nothing new about the firm, reduce credit in anticipation of the reaction by other lenders to the same firm.
The Red Queen dynamic predicts that organizations will converge in performance, forcing leaders to run harder just to maintain their position. However, do organizations converge in form as well? We draw on unique longitudinal data from the world auto industry to track change over time in manufacturing performance and practices. Using a fuzzy set methodology, our results confirm a Red Queen dynamic but reject a convergence in form despite isomorphic pressures to conform.
Cancer drugs have become more expensive over the past few years, leading many people to question whether the treatments are really worth their high costs. But despite the sticker shock, cancer medicines have provided good value for money.
We consider a sequential adaptive allocation problem which is formulated as a traditional two armed bandit problem but with one important modification: at each time step t, before selecting which arm to pull, the decision maker has access to a random variable Xt which provides information on the reward in each arm. Performance is measured as the fraction of time an inferior arm (generating lower mean reward) is pulled.
This paper investigates the question of whether so-called anomalous returns predicted by accounting numbers are normal returns for risk or abnormal returns. It does so via a model that shows how accounting numbers inform about normal returns if pricing were rational. The model equates expected returns to expectations of earnings and earnings growth, so that any variable that forecasts earnings and earnings growth also forecasts required returns if the market prices those outcomes as risky.
For better or worse, most of us find ourselves surrounded by others whose goals and interests are not perfectly aligned with our own. And so each day, most of us face one or more versions of the same basic question: How hard should I push? When people assert themselves forcefully, they may get their way in some instrumental fashion, but they may fail to get along with their counterparts. When people forego pursuing their interests, they may get along with others, but their acquiescence may mean a failure to get their way.
The rate of increase of longevity has varied considerably across U.S. states since 1991. This paper examines the effect of the quality of medical care, behavioral risk factors (obesity, smoking, and AIDS incidence), and other variables (education, income, and health insurance coverage) on life expectancy and medical expenditure using longitudinal state-level data. We examine the effects of three different measures of the quality of medical care.
Economic evaluation of climate policy traditionally treats uncertainty by appealing to expected utility theory. Yet our knowledge of the impacts of climate policy may not be of sufficient quality to justify probabilistic beliefs. In such circumstances, it has been argued that the axioms of expected utility theory may not be the correct standard of rationality. By contrast, several axiomatic frameworks have recently been proposed that account for ambiguous beliefs. In this paper, we apply static and dynamic versions of a smooth ambiguity model to climate mitigation policy.