Determinants of internet use by school-age children: The challenges for Mexico during the COVID-19 pandemic

The COVID-19 pandemic has further highlighted the deep digital divide in Mexico and the enormous challenge faced by its education system in continuing to educate the country's students while under confinement. The objective of this article was to examine the determinants of internet access, use and productive uses for school-age children in households of different socioeconomic levels. The Heckman selection model was estimated based on data taken from the Encuesta Nacional sobre Disponibilidad y Uso de Tecnologías de la Información en los Hogares (ENDUTIH or National Survey on the Availability and Use of Information Technologies in the Household) 2018. The results obtained show that the probability of having children internet accessing and usage patterns (homework, courses, and blogs) depends on level of schooling, economic status, digital skills, and place of residence, as well as the presence of electronic devices and infomediaries in the household. These findings suggest the urgent need to redesign current ICT policy with a long-term integrated vision that guarantees access to ICTs and their productive use for students immersed in an ecosystem of educational innovation for the XXI century.     

An electronic engineering curriculum design based on concept-mapping techniques

Curriculum design is a concern in European Universities as they face the forthcoming European Higher Education Area (EHEA). This process can be eased by the use of scientific tools such as Concept-Mapping Techniques (CMT) that extract and organize the most relevant information from experts’ experience using statistics techniques, and helps a working group to achieve conclusions. This paper presents an empirical exploratory research study related to the application of the CMT to the design of the Electronic Engineering (EE) Degree at the University of Seville, Spain. Considering the Career-space conclusions as the initial point, the main relevant competences were identified in a brainstorming technique. These competences are organized according to their affinity using CMT, establishing and interpreting the main clusters and their relative importance. Finally, a reliability analysis of the concept maps was carried out verifying the correctness of the procedure and validating the results for the curricula adaptation. This Project has been funded by the Spanish PAFPU (“Plan Andaluz de formación del profesorado universitario”), from the Quality Assurance Agency for Andalucía Unversities, (UCUA).     

关于解析函数变形的几个定理

本文给出了解析函数 w=u(x,y)+iv(x,y)变形为 Z 的一无复变函数 f(Z)的几个定理并依据这些定理做出这种变形的简便方法。     

Dynamic monopoly pricing with network externalities

In this paper, we study the optimal dynamic monopoly pricing for a good which exhibits positive network externalities. When network externalities are of sufficient magnitude, we show that, contrary to the Coase theorem, (1) there is no time inconsistency problem; (2) subgame perfect equilibrium prices increase as time passes. From this point of view, positive network externalities allow the monopoly to commit itself credibly to increasing future prices.Ce papier étudie la tarification optimale intertemporelle d'un monopole qui vend un bien exhibant des externalités positives de réseau. Lorsque ces externalités sont suffisamment importantes, nous montrons que, contrairement au théorème de Coase, (1) il n'y a pas de problème d'incohérence temporelle, (2) les prix d'équilibre parfait croissent avec le temps. De ce point de vue, les externalités positives de réseau permettent au monopole de s'engager crédiblement sur une politique de prix futurs à la hausse.     

Exploring the sociocultural determinants of de novo versus de alio entry in emerging industries

The influence of institutional factors on firm entry has long interested strategy scholars. However, we have limited understanding of how the sociocultural environment, defined as the unwritten, decentralized “rules of the game,” influences founding rates in emergent industries; we know even less about how these noneconomic factors differentially influence entry by new entrepreneurial (de novo) firms versus diversifying incumbent (de alio) firms. Utilizing a unique dataset on entry in the green building supply industry, we find that, while economic and policy factors are highly correlated with de alio entry, the sociocultural environment exerts a greater influence on de novo firms. Our findings contribute to the literature on corporate demography, institutions and entrepreneurship, and industry emergence. Copyright © 2013 John Wiley & Sons, Ltd.     

De novo venture strategy: arch incumbency at inaugural entry

By definition, de novo industry ventures do not share many market‐contact points with incumbents—itself an important source of competitive ‘stability’ through mutual forbearance. As such, these ventures are often subject to aggressive retaliation at the outset, which could threaten their very survival. In this study, the notion of an arch incumbent is developed, hypothesizing that, in general, a large market overlap with an incumbent lowers the survival odds of a de novo entrant. However, a large market overlap with the arch incumbent combined with an aggressive inaugural market entry or a different market positioning reduces the probability of retaliation by the arch incumbent (and subsequently other incumbents as well), and hence increases the probability of survival for a de novo entrant. The empirical experience of de novo ventures in the intra‐European passenger airline industry supports these hypotheses. Copyright © 2009 John Wiley & Sons, Ltd.     

De‐escalation Mechanisms in High‐technology Product Innovation

Many decision‐makers struggle to reduce commitment to failing endeavors. While de‐escalation mechanisms have been documented and tested in information technology, accounting, psychology, and organizational behavior, little work has addressed de‐escalation in innovation. This study identifies and examines the applicability of de‐escalation mechanisms specifically in new product development (NPD) projects. Initially, we conducted an extensive literature review to identify de‐escalation mechanisms found in research across different academic disciplines. Subsequently, we conducted a qualitative study using semistructured interviews to gather primary data. In total, using a sample of organizations that compete in high‐technology industries, 31 managers and engineers in 15 NPD projects that were terminated prior to completion were interviewed regarding mechanisms used to de‐escalate commitment to failing new product innovation projects. Several mechanisms reportedly used for innovation projects parallel those identified in the previous literature. More importantly, the authors uncover novel and previously undocumented ways to discontinue or redirect poorly performing projects. Specifically, internal competitions, feature‐level de‐escalation, continual assumption assessment, benchmarking, roadmaps, and comprehensive product testing are particularly well suited for innovation projects. These findings extend the body of extant literature on de‐escalation of commitment to include innovation, notably in high‐technology settings. The study also highlights that organizations may want to accept or even encourage failure, thereby increasing the efficacy of resource use. Implications for further research and practice are offered.     

Why history matters: Micro-and macro-foundations in a corporate de alio spinoff

Much of the discussion surrounding dynamic capabilities has focused on mature and established corporate enterprises escaping core rigidities. Less understood is the role of dynamic capabilities in corporate spinoffs that represent a category of de alio (“from others”). These firms offer a novel context when investigating dynamic capabilities, as they are technically “new” firms yet demonstrate a level of establishment due to privileged access to resources from a corporate parent. We explore how incubation and attachment to a parent influences tacit and explicit transfer of resources and supports sensing and seizing in the early growth corporate de alio spinoff, promoting opportunities for transformation as the spinoff matures. Through an analysis of a longitudinal, empirical, illustrative case, we integrate Garnsey's Penrosean-inspired Theory of the Early Growth of the Firm with Teece's dynamic capabilities framework to illustrate how micro- and macro-foundations of dynamic capabilities unfold in a corporate de alio spinoff during incubation and following spinoff. This study builds an understanding of how corporate de alio spinoffs can more successfully navigate ambiguity by leveraging dynamic capabilities, the foundations of which emerge in a parent entity.     

Compensation strategy: does business strategy influence compensation in high‐technology firms?

Drawing on the strategic employee group concept, this study empirically examines whether a firm's innovation strategy influences compensation systems for strategic employee groups in the high‐technology industry. We focus on compensation packages for R&D employees who play a critical role in successful implementations of innovation strategy. Using compensation data for middle‐level managers and professional employees from 237 firms in the high‐technology industry, we found that a firm's strategic intention to pursue innovation has a significant influence on the relative pay level, compensation time horizon, and stock option vesting period lengths of this strategic employee group. Copyright © 2006 John Wiley & Sons, Ltd.     

A note on “minimizing a weighted quadratic function of job lateness in the single machine system”

A set of jobs is to be scheduled on a single machine where an idle time is allowed to be inserted before the processing of the first job begins. The objective is to find an optimal sequence that minimizes the weighted sum of a quadratic function of job lateness. Sen et al. [Sen, T., Dileepan, P., Lind, M.R., 1995. Minimizing a weighted quadratic function of job lateness in the single machine system. International Journal of Production Economics 42(3), 237–243] presented a branch-and-bound algorithm for the problem; however, as shown in this note, their algorithm does not work because the branching rule for adjacent jobs is not applicable to non-adjacent jobs.     

Decoupling market incumbency from organizational prehistory: Locating the real sources of competitive advantage in R&D for radical innovation

The creative destruction literature has argued that differences in R&D performance of incumbent vs. entrant firms can be explained through organizational change theories about established vs. de novo firms. A disconnect exists between these theories and the available empirical evidence because often the best performing firms are established firms as well. I propose to resolve this disconnect by distinguishing between market incumbency (presence in a market prior to a discontinuity) and organizational prehistory (organizational experience prior to a transition, whether between technologies or between markets). Doing so allows me to contrast incumbent vs. entrant and de alio vs. de novo studies, and to suggest more robust future research designs. I illustrate my proposition using qualitative data from the anticancer and AIDS‐treatment drug markets. Copyright © 2012 John Wiley & Sons, Ltd.     

Quantifizierung und Systematisierung der technischen und verhaltensbedingten Stromeinsparpotenziale der deutschen Privathaushalte

Electricity consumption in German households accounts for more than 10 % of energy-related CO₂ emissions. In spite of substantial improvements in, for example, the efficiency of household appliances, there is still a considerable electricity savings potential to be tapped in this sector. The possible contribution that the German residential sector can make to climate protection is correspondingly large. This paper aims to structure and quantify electricity savings potentials which could be exploited in German households either through investment measures or changed user behaviour. The total theoretical potential which can be tapped through the purchase of efficient household appliances and the replacement of electrical heaters and hot water generators (i.e. by encouraging investment) amounts to approx. 90 TWh/a. This corresponds to more than 60 % of the current electricity demand of all German households. By means of changed user behaviour, approx. 30 TWh of electricity could be saved according to our calculations. These results presented in this article were reached within the scope of the TRANSPOSE interdisciplinary research project (http://www.uni-muenster.de/Transpose/, the complete analysis can be downloaded at http://www.uni-muenster.de/imperia/md/content/transpose/publikationen/buerger_working_paper_3.pdf). This project is funded within the framework of the ‘Social-ecological Research’ programme of the German Federal Ministry for Education and Research.     

Mode of entry and ex-post performance

In this study I develop and empirically test hypotheses delineating how a set of industry- and firm-level factors are differentially associated with postentry performance of de novo and acquisitive entrants. First, I conceptualize structural entry barriers as sunk costs or irrecoverable investments that entrants must make in the entered industry to be competitive vis-à-vis incumbents. I then argue that de novo and acquisitive entrants differ in three important ways: (1) incremental vs. up-front sunk cost investments in overcoming impediments to entry; (2) increasing productive capacity vs. changing ownership in the entered industry; and (3) low vs. high costs of integration when realizing synergies with parent firms. I use the Trinet, FTC-ALB, and Compustat data bases to construct a sample comprising de novo and acquisitive entries made during the period 1980–82. Next, I evaluate postentry survival and growth between 1982 and 1986. Overall, empirical tests provided partial support for the hypotheses, and the explained variance in my models ranged from 17 percent to 37 percent. © 1998 John Wiley & Sons, Ltd.     

Ideas About Thinking: Excerpts from Edward de Bono's "Letter to Thinkers"

How often do we stop to think about how we think? For years, Edward de Bono has been getting us to think about thinking. It was Dr. de Bono, for example, who coined the term "'lateral thinking" where, he says, richness is what matters, compared to vertical thinking where Tightness matters. In his periodic Letters to Thinkers, he stimulates lateral thinking by the way he gets his readers to turn problems around and look at them from a fresh perspective. This article is made up of excerpts from his Letters to Thinkers, published by Cower Publishing Company Limited, with permission.     

Property rights and international investment in information technology services

Many modern information technology services are increasingly being produced in a host country to serve clients in an offshore location. As a result, the internationalization of service functions is beginning to resemble that of their more traditional manufacturing counterparts. This paper examines the role of formal and de facto property rights protection in the offshore location choice of information technology services. I also explore the role of a firm's global subsidiary network and its experience with similar property rights regimes. Using investment data based on 152 firms and their international information service investments between 2002–2006, the empirical results highlight the role of de facto property rights protection and related experience in location choice.Copyright © 2012 John Wiley & Sons, Ltd.     

There and Back Again: The De‐Licensing and Re‐Licensing of Barbers in Alabama

The economic effects of occupational licensing remain an understudied topic, but even less is known about the effects of the removal of licensing legislation. In this article, we take advantage of a natural experiment that occurred in the state of Alabama. Alabama was the last state to begin licensing barbers in 1973 and also the only state to de‐license barbers (in 1983). Relying on data from 1974 to 1994, we find evidence that barber de‐licensing reduced the average annual earnings of barbers as well as the number of cosmetologist employees per million residents in Alabama, although not all our results are statistically significant. We also find evidence that de‐licensing resulted in small increases in the number of barber shops and decreases in the number of cosmetology shops in Alabama. In recent decades, a number of attempts have been made to re‐license the occupation — most recently with a barber licensing bill that became law in September 2013. The result is that barbering in Alabama is once again a licensed occupation. Our limited evidence suggests that the re‐licensing of barbers in Alabama may already have had an effect on pay and on the number of barber shops.     

Growth and survival: The moderating effects of local agglomeration and local market structure

One of the central explanations of the high failure rates of de novo entrants is the liability of smallness. As a corollary, most prior literature has suggested that firms should experience survival benefits from growth. In this paper, we argue that survival benefits need to be balanced against the potential cost of rapid growth, and they are contingent upon the structure of the environment. We predict a curvilinear relationship between an entrant's growth rate and failure, and argue that the relationship is contingent upon the local agglomeration of economic activity and the local structure of competition. We test and find support for our predictions using firm‐level longitudinal data of all de novo entrants into the Canadian manufacturing sector between 1984 and 1998. Copyright © 2014 John Wiley & Sons, Ltd     

The Insolvent Thrifts of 1982: Where Are They Now?

In 1982, 237 thrifts were GAAP (Generally Accepted Accounting Principle) insolvent. By 1987, 92 of these were either merged or closed and 77 remained insolvent. The remaining 68 were GAAP solvent with an average GAAP-to-total-assets ratio of 5.6%. The purpose of this paper is to identify the factors that affected the probability of solvency for the 1982-insolvent thrifts over the period 1983–1987.
To identify these factors, the probability of insolvency is modeled in each year between 1983 and 1987 using logistic regression. Because a thrift can earn its way out of insolvency or raise outside capital, the probability of solvency is a function of the infusion of outside capital along with balance sheet and income statement ratios reflecting the thrifts earning ability. The only variable consistently significant in each year is the variable reflecting the raising of outside capital.     

Differentiation strategies in ‘stalemate industries’

Empirical studies conducted at the Institut de Recherche de l'Entreprise (Lyon, France) show that, in ‘stalemate industries’ (cf. the BCG's typology, 1981), differentiation strategies are effective and profitable alternatives to the usual strategic recommendations. The knowledge of customers' behavior shows up several opportunities for differentiation, hidden by some kind of ‘strategic presbyopia’. Total quality or ‘zero default’ strategy (product quality regularity, punctuality of deliveries, quick response to unexpected orders, quick and correct answers to requests, short delivery times) is the major opportunity for differentiation. Such strategies are compatible with a low-cost position; excellent companies which succeeded in building this ‘total advantage’ (diferentiation + low cost) over their competitors enjoy the highest market share growth and profitability.     

The impact of digitalisation on remittances. Evidence from El Salvador

This paper carries out a microeconomic analysis of the determinants of remittances from a receiving perspective in El Salvador. Specifically, using data from the ‘Encuesta de Hogares de Propósitos Múltiples of 2016’ (2016 Multi-purpose Household Survey -EHPM16), the characteristics of households that affect the reception of remittances in El Salvador in 2016 were analysed, focusing on the level of digitalisation in households. Determinants of remittances are not everlasting and are affected by social and economic changes. In this sense, the effect on remittances caused by an increase in the widespread use of Information and Communication Technologies (ICT) is not an exception. Based on a two steps selection model, the results point out that the household's level of digitalisation significantly increases the probability of receiving remittances, not their amount.