The clinical and economic burden of significant bleeding during lung resection surgery: A retrospective matched cohort analysis of real-world data

Objectives: The objective of this retrospective study was to quantify the clinical and economic burden of significant bleeding in lung resection surgery in the US.

Methods: This study utilized 2009–2012 data from the Premier Perspective Database^TM. Adult patients with primary pulmonary lobectomy or segmentectomy procedures were categorized by the surgical approach (VATS vs open) and primary diagnosis (primary or metastatic lung cancer vs non-lung cancer). Patients requiring ≥3 units of blood products with at least 1 unit of PRBCs: “significant bleeding” cohort; those requiring <3 units: “non-significant bleeding” cohort; and those not requiring blood products: “no bleeding” cohort. A matched cohort analysis was performed between the “significant bleeding” and the “no bleeding cohort” using matching variables: hospital, lung cancer diagnosis, year of surgery, APR-DRG severity score, procedure type and approach, age, and gender.

Results: The “All-patient” cohort comprised 21,429 patients: 213 “significant bleeding”; 2,780 “non-significant bleeding”; and 18,436 “no bleeding”. Overall incidence of significant chest bleeding was 0.99%. Patients from “significant bleeding” cohort and “non-significant bleeding” cohort had 2.5 days and 2 days (p?p?Conclusions: Although significant bleeding during lung resection surgery is rare, patients with such complication could stay longer at the hospital and cost an average of $13,103 more than those without.     

Culture and auditor choice: A test of the secrecy hypothesis

The purpose of this study is to investigate whether firms’ auditor choice relates to national culture. We construct a novel measure of secretiveness based on Hofstede [Hofstede, G., 1980. Culture’s Consequences: International Differences in Work Related Values. Sage Publications, Beverly Hills, CA] cultural factors. Using a very large sample of firms from 37 countries and controlling for a number of firm- and country-level factors, we find that firms in “more secretive” countries are less likely to hire a Big 4 auditor. We also document that the relation between secrecy dimension of national culture and auditor choice is mitigated by the firms’ degree of internationalization. These results establish a link between national culture and financial reporting quality through the firm’s choice of auditor.     

Performance Measure Aggregation in Multi‐Task Agencies

In multi‐task environments, the efficiency of aggregating managerial performance information and the degree of customization/standardization are closely related. Aggregation without information loss (i.e., statistically sufficient) requires at least as many measures as there are effective tasks (which arise through a task aggregation process analogous to that applied to homogeneous activities in activity‐based costing) and can be used uniformly for evaluation across similar jobs. Aggregation without economic loss (i.e., economically sufficient) can be achieved with a single performance measure but requires customization even across similar jobs. The main implication is that job complexity, the number of aggregate performance measures, and the degree of customization in performance measurement are interrelated. In particular, at the same level of performance measure aggregation, we predict highly customized performance evaluation in complex multi‐task jobs and standardized (uniform) performance evaluation only in simpler jobs with fewer tasks. We discuss additional empirical implications in the conclusion.     

An Economic Analysis of Yard Care and Synthetic Chemical Use: The Case of San Francisco

Yard care is an economically important household production activity that also has potentially significant environmental or health impacts. Of particular concern are the possible negative impacts of using synthetic pesticides and fertilizers. But economic models and empirical analyses of yard care and chemical use are rare. We develop a simple model of household production and consumption to analyze yard care and chemical use. We then estimate a multinomial logit model of these behavioral choices with household data from San Francisco. Attitudes towards the quality of one's outdoor residential environment and time scarcity are important determinants of the odds of chemical use whereas financial variables play the major role in determining the odds that people have and care for yards. These results could help to improve educational or marketing campaigns that aim to reduce potential or actual problems associated with yard chemical use. Better data for models similar to this one are needed for future research.     

Technology Foresight Activities in Korea and in Countries Closing the Technology Gap

This article discusses technology foresight in selected countries which were politically dependent (colonial) before World War II and considered as “under-developed” in the post-war period. Most of them show considerable economic dynamism in the 1990s, which is not always based on their own scientific and technological capability. For this group of countries, national exercises in technology foresight are likely to be an important tool in planning the strategic direction for science and technology development in order to catch up economically as well as socially. In Korea, which has recently become an OECD member, comparative advantage based on factors such as low wages and protected industries are no longer effective as the economy is now wide open to the world. Foresight is being used to look at comparative advantages based on Korea’s own knowledge-creating activities. In southeast Asian countries, foresight is still in an infant stage, but most of these have medium-term planning cycles and have undertaken longer-term vision studies. In South Africa, a national foresight project is running, as is an adapting foresight process to make the large national research organization fit. In Latin America, an agenda has been set up which indicates the desire of several countries to engage in foresight activities using different approaches.     

The Korean stock market volatility during the currency crisis and the credit crisis

This paper studies the volatility of the Korean stock market during the Asian currency crisis of 1997–1998 and the global credit crisis of 2008–2009. We use a fad model with Markov switching heteroskedasticity, which was first proposed by Kim and Kim (1996). Using the monthly data from January 1980 to October 2009, we find that the volatility of the transitory component of the stock return, or fads, increased during the currency crisis, but did not rise much during the credit crisis. It implies that the stock price fluctuations were not driven by irrational sentiments during the recent global crisis as much as during the former crisis. However, when we consider the dollar value of the Korean stock index in order to estimate the volatility that foreign investors confront, we find that the volatility of the transitory component was raised during the credit crisis as well as during the currency crisis. That is, foreign investors experienced greater volatility than domestic investors in the recent financial market turmoil. This asymmetric volatility that domestic and foreign investors face is one of the characteristics of the credit crisis.For more detailed analysis, the same model was applied to the weekly data from January 2005 to October 2009 and provided the result that the data measured by won–dollar exchange rates were more increased than the raw data. It holds that foreign investors confronted much greater volatility than domestic investors while the stock volatility was relatively lower in the credit crisis state than in the currency crisis state.     

Customer-to-customer interactions on customer citizenship behavior

This study examines how both positive and negative customer-to-customer interactions (CCIs) simultaneously influence customer citizenship behavior. Specifically, we posit that (1) positive CCI and dysfunctional customer behavior (negative CCI) influence customers’ affection with service, (2) customers’ affection with service leads to positive customer citizenship behavior, and (3) service providers’ relationship investment moderates the relationships between positive (negative) CCI and customers’ affection with service. The study sample consisted of 362 customers at a major public recreation center in South Korea. We used latent moderated structural equation modeling and the bootstrapping technique to test the proposed hypotheses. The results offer full support for the expected differential effects of positive CCI and dysfunctional customer behavior on customer citizenship behavior, and provide important implications for research and practice.     

How Do Social Media Affect Analyst Stock Recommendations? Evidence from S&P 500 Electric Power Companies' Twitter Accounts

Research summary : The importance of firm‐stakeholder relationships is gaining increasing attention. Although a theory of the drivers and consequences of stakeholder pressure has been developing, it focuses on pressures from organized stakeholders such as shareholders, NGOs, and activists, and does not incorporate the emerging possibility that individual voices may matter. By exploring corporate Twitter, which facilitates movement of individual stakeholders such as customers to a higher stakeholder class by providing them with a greater sense of power and urgency, we study the circumstances under which customer voices significantly affect analyst stock recommendations. We find that favorable reactions to firm‐initiated messages matter, directly or indirectly, depending on the messages' growth implications. Customer‐initiated negative messages have a significant impact only with high volume and formal institutions that support customer opinions. Managerial summary : Social media is increasingly used by firms for disclosing information and engaging stakeholders. Yet, we know little about whether and how social media usage matters. We show how corporate Twitter usage may influence analyst stock recommendations. Our interviews of securities analysts suggest that social media is not institutionalized yet, but increasingly used as a source of channel checks, especially for vibes, validations, and so on. Our analyses of corporate Twitter accounts show that both firm‐initiated and customer‐initiated tweets can have significant impact on analyst recommendations under certain conditions. For firm‐initiated tweets, the extent of retweets is an important factor, along with the content of tweets, in particular, growth implications. For customer‐initiated tweets, negative tweets matter, but only with high volume and regulatory structure that supports customer protection. Copyright © 2017 John Wiley & Sons, Ltd.     

A GOOD ADVISOR

Effective education requires strategic consideration. If students doubt the motives of teachers and advisors, then students rationally ignore the advice they receive. Valuable information is lost in such bad communication outcomes and, consequently, the quality of education suffers. In this paper, we argue that an advisor's sacrifice is an essential virtue of a good advisor for efficient communication between an advisor and a student. We model the relation between them as a signaling game. We find a separating equilibrium in which a good advisor (whose objective function truly coincides with the student's own objective function) makes a costly sacrifice that causes the student to believe what the advisor says, while a non‐good advisor (whose objective does not coincide with the student's) chooses not to make the costly sacrifice and, consequently, the student completely ignores the advisor. In fact, it turns out to be the unique equilibrium that survives the Intuitive Criterion. The model demonstrates the importance of making students aware of those aspects of the advisor's objectives that students may not realize are closely aligned with their own (e.g., the extent to which an advisor cares about students' academic and professional trajectories as evaluated by students themselves).     

Evidence of latecomers’ catch-up in CoPS industries: a systematic review

ABSTRACT

There has been a controversial issue in existing literature regarding whether latecomers can catch up in Complex Products and Systems (CoPS) industries. In an attempt to address this issue, we employ systematic review method and analysed 39 previous studies. We found substantial evidences of catch-up or leapfrogging in CoPS industries. The catch-up patterns in the CoPS industries were similar to those in the mass-produced goods sectors. There were 15 success or failure factors for catch-up across CoPS industries, and the top five most frequently appeared factors were government support, technology transfer, in-house R&D, industry ecosystem or cluster, and external alliances.