Apparel catalog patronage: Demographic,lifestyle and motivational factors

This study was designed to profile catalog shoppers of apparel and to examine their frequency of shopping. Specifically, it focused on the relative importance of consumers' lifestyle, demographic, and motivational factors in catalog shopping patronage. Data from 680 respondents were analyzed. The data indicated a relationship between consumers who shop for apparel from catalogs and some of the variables included in the study. A multiple regression model indicated that when several variables were considered, the frequent catalog shoppers tended to be older and better educated than infrequent catalog shoppers. They were also more likely to engage in inactive pursuits rather than sports activities and were more likely to perceive convenience as an important factor in their decisions to shop from catalogs than were infrequent catalog shoppers.     

Hospital costs associated with intraoperative hypotension among non-cardiac surgical patients in the US: a simulation model

Objective: Recent studies indicate intraoperative hypotension, common in non-cardiac surgical patients, is associated with myocardial injury, acute kidney injury, and mortality. This study extends on these findings by quantifying the association between intraoperative hypotension and hospital expenditures in the US.

Methods: Monte Carlo simulations (10,000 trial per simulation) based on current epidemiological and cost outcomes literature were developed for both acute kidney injury (AKI) and myocardial injury in non-cardiac surgery (MINS). For AKI, three models with different epidemiological assumptions (two models based on observational studies and one model based on a randomized control trial [RCT]) estimate the marginal probability of AKI conditional on intraoperative hypotension status. Similar models are also developed for MINS (except for the RCT case). Marginal probabilities of AKI and MINS sequelae (myocardial infarction, congestive heart failure, stroke, cardiac catheterization, and percutaneous coronary intervention) are multiplied by marginal cost estimates for each outcome to evaluate costs associated with intraoperative hypotension.

Results: The unadjusted (adjusted) model found hypotension control lowers the absolute probability of AKI by 2.2% (0.7%). Multiplying these probabilities by the marginal cost of AKI, the unadjusted (adjusted) AKI model estimated a cost reduction of $272 [95% CI?=?$223–$321] ($86 [95% CI?=?$47–$127]) per patient. The AKI model based on relative risks from the RCT had a mean cost reduction estimate of $281 (95% CI?=?–$346–$750). The unadjusted (adjusted) MINS model yielded a cost reduction of $186 [95% CI?=?$73–$393] ($33 [95% CI?=?$10–$77]) per patient.

Conclusions: The model results suggest improved intraoperative hypotension control in a hospital with an annual volume of 10,000 non-cardiac surgical patients is associated with mean cost reductions ranging from $1.2–$4.6 million per year. Since the magnitude of the RCT mean estimate is similar to the unadjusted observational model, the institutional costs are likely at the upper end of this range.     

Bounding quantile demand functions using revealed preference inequalities

This paper develops a new approach to the estimation of consumer demand models with unobserved heterogeneity subject to revealed preference inequality restrictions. Particular attention is given to nonseparable heterogeneity. The inequality restrictions are used to identify bounds on counterfactual demand. A nonparametric estimator for these bounds is developed and asymptotic properties are derived. An empirical application using data from the UK Family Expenditure Survey illustrates the usefulness of the methods.     

A natural experiment of the effect of advertising on sales: the SASOL case

China's so-called ‘reform and opening up’ policy (Gai Ge Kai Fang), implemented nearly 30 years ago, has led to tremendous economic development. China's nominal Gross Domestic Product (GDP) was 3.25 trillion US dollars in 2007, making it the fourth largest economy in the world. At the same time, income inequality has become quite skewed in China, inviting considerable criticism. Moreover, the trend towards greater income inequality persists. Of particular public policy relevance is the effect of income inequality on health disparities in China, particularly for low-income households. This study addresses this issue using a longitudinal dataset from the China Health and Nutrition Survey (CHNS) over the period 1997 to 2006. Our central finding is that income inequality affects health differently by socioeconomic status: income inequality harms individual health among low income households by more than it does among high income households. More specifically, health is more adversely affected by greater income inequality for households with low incomes. China's central government is committed to making further investments in the health care system. As part of that effort, attention should be directed at low income households to reduce health inequality, possibly providing them with a health insurance safety net similar to Medicaid in USA.     

Explaining innovation in mature industries: evidences from Italian SMEs

In recent years management scholars and practitioners have been interested in innovation in high-technology industries. However, little attempt has been undertaken to examine factors affecting innovation in mature industries, such as agro-food. In this paper we tried to fill this literature gap. We hypothesise that weak-collaborations have a positive effect on firms’ innovations. We test our hypotheses on a sample of Italian agro-food firms. We discuss our results and present some theoretical and practical implications.     

Tourists’ travel time values using discrete choice models: the recreational value of the Teide National Park

Abstract

The value of travel time is one of the most important factors in recreation demand models. Traditionally, the most common approach for its calculation has been the use of different proportions of the wage rate; however, criticisms of this method abound because in a recreational trip the relevant measure is the opportunity cost of leisure time rather than work time. In this paper, we adopt a novel approach in the literature using discrete choice models based on short-term decisions and independent of the labor market. We obtain the value of travel time through the trade-off between time and money considered by the tourist visitors when choosing the transport mode and we present the first calculation of the recreational value of the Teide National Park. Specifically, using a Revealed Preference survey of 801 park visitors, we estimate Mixed Logit models accounting for random preference heterogeneity, derive travel time values and incorporate them into a Zonal Travel Cost Method. This approach allows us to estimate different time values depending on transport mode and stage of the trip and shows that the use of discrete choice models instead of the wage rate approach has a strong impact on the recreational value calculated.     

SME growth in the service sector: A taxonomy combining life-cycle and resource-based theories

The approach to the life-cycle theory has been used as an analytical tool of the firms' growth. Several researchers argue that organisations move across several development stages where different problems are found resulting from different management styles and priorities, and resources. This research aims to develop an empirical taxonomy of small medium enterprise (SME) growth in the service sector based on life-cycle and resource-based theories. The data were submitted to bivariate and multivariate analyses to develop and test an empirical life-cycle model. It was possible to conclude that the firms could be clustered in three life-cycle stages. Some implications and future researches are addressed.     

The impact of immigrant concentration in schools on grade retention in Spain: a difference-in-differences approach

Since the late 1990s, Spain has played host to a sizeable flow of immigrants who have been absorbed into the compulsory stage of the education system. In this article, our aim is to assess the impact of that exogenous increase in the number of immigrant students from 2003 to 2009 on grade retention using Spanish data from PISA 2003 and 2009. For this purpose, we use the difference-in-differences method as a dose treatment capable of detecting whether the immigrant concentration has had a significant effect on student performance. Our results evidenced that their arrival does not on average decrease school promotion rates with respect to 2003 and is even beneficial to native students. However, although the concentration of immigrant students at the same school does have a negative impact on immigrant students generating more grade retention, native students are unaffected until concentrations of immigrant students is above 15%.     

Fiscal equalization and lobbying

Inter-regional redistribution through tax-base equalization transfers is examined in a setting in which taxpayers, organized as lobby groups, influence policy making. With lobbying only at the local level on tax rates, social welfare maximization implies, ceteris paribus, high (low) equalization rates on the tax bases backed by the strong (weak) lobby groups. With lobbying also at the central level, equalization is distorted downward on all tax bases if the pressure groups are similar in terms of lobbying power. It is instead distorted downward (upward) on the bases backed by strong (weak) groups if they are highly heterogeneous. In the latter situation, a uniform equalization structure may perform better than a differentiated one.