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On April 2, 1987, IBM unveiled a series of long‐awaited new hardware and software products. The new computer line, dubbed the Personal Systems 30, 50, 60, and 80, seems destined to replace the XT and AT models that are the mainstay of the firm's current personal computer offerings. The numerous changes in hardware and software, while representing improvements on previous IBM technology, will require users purchasing additional computers to make difficult choices as to which of the two IBM architectures to adopt.

Communications regarding this column should be addressed to Mrs. Cheney, Peabody Library School, Nashville, Tenn. 37203. Mrs. Cheney does not sell the books listed here. They are available through normal trade sources. Mrs. Cheney, being a member of the editorial board of Pierian Press, will not review Pierian Press reference books in this column. Descriptions of Pierian Press reference books will be included elsewhere in this publication.

This column has always intended to provide in‐depth, comparative reviews of abstracting services, indexes, serial bibliographies, yearbooks, directories, almanacs and other serial tools which would normally be housed in reference departments. For the purposes of this column, reference serials are materials which must meet two rather flexible requirements: they must be useful as reference sources and they must be issued as serials or be titles which are superseded periodically by new editions.

This study aims to identify the marginal impact of introducing a signal attribute of pasture-raised beef on consumer willingness to pay (WTP) for other independent attributes.

The study is divided into two steps. The first, qualitative, consisted of investigating the values consumers have regarding beef production. To this end, 52 interviews with Brazilian and US consumers were conducted using laddering. In the second, quantitative, six experiments, (face to face and online) with 267 consumers of beef were performed.

As a result, the main value found for the Brazilians was security, while for the Americans was self-direction. For consumers, the WTP for animal welfare was the most important in the choice experiments where this information was present.

These findings offer an alternate beef differentiation, enabling it to be sold with higher added value by integrating these.

Using social relations theory, we argue that entrepreneurship ecosystems must also include relationships such as market pricing, equality matching, authority ranking and communal sharing to be successful and thrive.

We theorize using Fiske’s typology that a successful entrepreneurial system must have certain characteristics to be successful.

In doing so, we suggest an alternative perspective of the role of exchange relationships in ecosystems which considers both the geographic context and social relationships as equally important ecosystem components. Our contributions include (1) exposing social processes as the explanatory mechanism for exchanges instead of solely market forces, (2) illustrating the role of regional cultural differences in exchanges and (3) emphasizing how entrepreneurs can better realize ecosystem benefits through understanding the methods of exchange in these ecosystems.

Social relationships include a wide variety of different types of resources and exchange mechanisms, so by their inclusion into the entrepreneurship ecosystem literature, a more complete view of ecosystems is possible.

The National Football League (NFL), the most lucrative sports league in the world, has its second largest foreign audience in Brazil. Its Brazilian broadcasts stimulate the audience to extrapolate television reception and interact through a social media platform, seeking to integrate a collective consumption. Thus, attachments are established between consumers and league. Based on this, this study aims to analyze how the interaction in social media of the Brazilian NFL audience, during the transmissions of its games, results in consumption attachments.

The method undertaken was Netnography, commonly used to investigate cultural practices occurring in online environments. The research corpus consisted of messages posted on Twitterhashtags created by the ESPN Brazil channels to reverberate its broadcasts of the league between 2016-2017 and 2017-2018 seasons.

The findings of this study indicate that Brazilian audience interaction in social media establishes consumer attachment with the NFL by means of the brand elements and aspects of social life, mediated by the league.

The research observed only the part of the Brazilian audience of the NFL that engages in the broadcasts of the games through social media.

The research of this study demonstrates how brands can use social media to enable social interactions that create or improve consumer attachments with them.

The study presents how a media brand imbricated in the American culture has been the target of attachment by Brazilian fans through social media interactions.

The purpose of this paper is to investigate the relationship between the chief data officer’s (CDO) presence and firm performance, and the moderating effect of firm size.

The performance data for 64 treatment firms with CDOs and 64 control firms without CDOs is collected from Compustat database. The Wilcoxon signed-rank test is used to analyze the performance differences between treatment firms and control firms. Hierarchical regression method is used to test the moderating effect of firm size.

The results indicate that the profit ratios of treatment firms are significantly improved after the appointment of CDOs, and the profit ratios of treatment firms are significantly higher than that of the control firms. For the cost ratios, the findings provide some empirical evidence revealing two of the cost ratios are lower and only one ratio is higher for the treatment firms after CDOs’ appointment. Firm size moderates the relationship between the CDO’s presence and firm performance indicator, ROS, in the same direction. Firm size has no moderating effect on relationships between CDO’s presence and other performance indicators.

The findings provide practical insights that will help managers to realize the importance of CDOs and their work. CDOs would bring some cost to the firms, but they would bring more profit to firms. In addition, if for large firms, the CDO’s presence would bring more ROS.

The study explores the relationship between the CDO’s presence and firm performance. It is the first attempt to explore the CDO’s presence and the cost performance in the specific time period, and the study is also the first attempt to analyze the moderating effect of the firm size on the relationship between the CDO’s presence and firm performance.

This study aims to investigate consumer ethnocentrism and determine its impact on actual purchasing behavior in relation to six product categories. It also examines the role of demographic variables as moderators in the relationship between ethnocentric tendencies and purchasing behavior.

A total of 467 completed questionnaires were obtained through convenience and snowball sampling. Data were analyzed using SPSS-24 and AMOS-23 software: SPSS to conduct the exploratory factor analysis and AMOS for the confirmatory factor analysis. Regression analysis was performed to determine the effect of ethnocentrism on purchasing behaviors; the SPSS process was used to test the moderating effects.

The consumer ethnocentric tendencies scale was collected in two dimensions: hard ethnocentrism, which influences actual purchasing behavior in five product categories; and soft ethnocentrism, which influences actual purchasing behavior in only two product categories. The results show that the effect of consumer ethnocentrism on purchasing behavior differs across product categories. Further, gender, marital status and personal income moderate this relationship.

Few studies investigate purchasing behavior across several product categories and the literature on consumer ethnocentrism does not address the impact of demographic variables as moderators in consumer behavior. This study contributes to the existing literature in four ways. First, it was conducted in Azerbaijan, a country with specific characteristics. Second, it examines the impact of ethnocentric tendencies on actual purchasing behavior. Third, it examines purchasing behavior in relation to six different product categories. Fourth, the moderating effect of demographic variables was tested.