The effects on pregnancy outcome and maternal iron status of powdered milk (PUR) and a milk-based fortified product (V-N) were compared in a group of underweight gravidas. These take-home products were distributed during regular prenatal visits. Women in the V-N group had greater weight gain (12.29 vs 11.31 kg, p less than 0.05) and mean birth weights (3178 vs 3105 g, p less than 0.05) than those in the PUR group. Values for various indicators of maternal Fe status were also higher in the V-N group. Compared with self-selected noncompliers, similar in all control variables to compliers, children of women who consumed powdered milk or the milk-based fortified product had mean birth weights that were higher by 258 and 335 g, respectively. Data indicate a beneficial effect of the fortified product on both maternal nutritional status and fetal growth.

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Purpose The phenomenon of intellectual capital in the firm has been deeply researched and immensely debated in the management literature in recent years. After three decades of evolution, it has become established as a mature field of research. At this point, a review of its theoretical foundations and current and future evolution provides us with the state of the art of intellectual capital in the firm. The purpose of this paper is to present a quantitative review of the existing literature on intellectual capital in the firm. Design/methodology/approach In this paper, the authors present a quantitative review of the existing literature on intellectual capital in the firm. To do so, the authors searched the JCR-SSCI database from 1990 to 2016 and identified 553 citing documents; these were split into three main periods in order to identify the interactions and path dependencies existing between different foundations of research. In addition, areas of current and future research connected with the theoretical foundations were identified. For these purposes, the authors used both co-citation analyses as well as bibliographical coupling. Findings In this paper, three main stages of IC evolution have been identified with the main topics and research frames, as well as their path dependencies. Additionally, four main areas of current and future development of IC have been identified: IC measurement, IC in new business models, IC disclosure, and its role in social capital and human resource practices. Research limitations/implications The present bibliometric study is a quantitative review of papers published in the Web of Science database. Originality/value By its dimensions ‒ broad academic disciplines and longitudinal character ‒ this bibliometric study constitutes a new quantitative review of the IC discipline, both drawing its intellectual evolution in the last decades, and showing current and future research trends in IC and the firm.

We analyse vertical boundaries of firms by identifying and comparing industrial, transactional and firm‐specific factors in such a way that industrial organization, new institutional economics and the capability‐based view are all taken into account. After testing the model in 155 firms in the Spanish meat industry, we observe that only factors associated with both transaction costs and capabilities have a statistical and economic relevance for explaining vertical integration. Firms vertically integrate to create specific investment between stages of the value chain, to internally exploit their pool of knowledge and capacities, and to guarantee quality of inputs and services employed. On the other hand, firms avoid high levels of vertical integration in the presence of high demand changes in order to stay flexible. Finally, providers or clients with market power do not seem to affect vertical boundaries in any consistent way.

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We argue that the benefits provided by locations inside science and technology parks evolve over time. Firms inside parks can improve performance due to certain advantages related to knowledge spillovers and shared resources that can be particularly useful in earlier stages of the industry life cycle. In these industries, local knowledge sharing is particularly useful because no standards are clearly established, as we have confirmed in a sample of 12,800 firms from the PITEC database, located either on-or off-park. We also find that young firms can benefit more from the park than more established businesses in terms of both business growth and innovative capacity. Although older firms have greater experience and investments that would increase their capacity to absorb external knowledge, their associated rigidities prevent them from incorporating changes into their structures.

In this paper we undertake a quantitative review of the existing literature on parks and incubators to identify their foundations from a longitudinal perspective. To do so, we searched records in the SSCI database from 1990 to 2015 and identified 318 citing documents, which we split into 4 periods of 5 years each, to identify the interactions and path dependence that exist between different foundations of research. We evaluate the evolution of the theoretical foundations of this research line taking into account changes in citations over time. We also identify areas of future research closely connected with the theoretical foundations already identified. For this purpose, we used two bibliometric techniques-co-citation analysis and bibliographic coupling-that enable us to assess the thematic similarity between scientific publications based on overlaps in their referencing patterns.