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The article discusses the strategy of "split trade" in the historic center of Mexico City, where many established commercial establishments set up street stalls, functioning as branches where sales are not recorded in accounting. These goods, many of which are produced abroad and in Mexico, enter the country without being declared at port and border customs. The text highlights the relationship between the informal sector and the formal sector of the economy, criticizing the conceptual separation between them. It also discusses the expansion of informal or precarious economic activities and the factors that contribute to this expansion, such as lack of state control, excessive regulations, and state tolerance. The article discusses the relationship between the informal popular economy and illegality in different countries. The popular economy depends on forms of social organization and mutual trust to function, while illegality is based on obligatory agreements that are imposed by force and, in some cases, by violence. The informal and precarious popular economy is expanding, as well as platform work, which is changing the economic model and labor relations. This text discusses the transformations of work in the context of digital technologies and the Covid-19 pandemic. The author proposes to rescue the native point of view when analyzing the sale of goods in Buenos Aires, highlighting that terms such as work, sale, money, and market do not only refer to economic issues, but also to ways of living and emotions. Other articles in the same dossier explore the everyday practices of popular activities, such as car theft in São Paulo and check discounting in Argentina, showing the existence of markets regulated by legal and illegal actors. The text is a list of bibliographic references from various authors and works related to the theme of informal economy, criminality, and violence in different urban contexts. [Extracted from the article]

This article aims to verify if the Brazilian companies' Capex have any contribution to their performance. The Brazilian companies considered were those part of Ibovespa from 1998 to 2007. It is hard to find in the literature studies that investigate how capex affect the companies' performance (LI, 2004). In Brazil, the researches normally analyze the impact on the stock prices based on the information's disclosure through window events technique (ANTUNES; PROCIANOY, 2003; FAMÁ; LUCCHESI, 2005; LYRA; OLINQUEVICTH, 2007; MCCONNELL; MUSCARELLA, 1985). This could be considered a gap in the financial discipline and this study is to reduce this gap. Thus, we employed the panel data technique with a sample of 508 companies. We also adopted the companies' market value and the earnings before interest and taxes (Ebit) as proxys for their performance. The results indicate that the capex has a positive relation to the companies' performance, however, no relation is found considering operational earnings. This suggests that Lyandres, Sun e Zhang (2008) and Titman, Wei e Xie (2004) results did not fit into Brazilian companies since there is no negative relation between capex and the companies' performance. We expect to give helping information to valuation model as well as guidance of quality on management decision. [ABSTRACT FROM AUTHOR]

The objective of the present article is to investigate the impact of organizational values in the perception of incentives and barriers to the creativity in the work place. Organizational creativity results from a complex combination of personal, historical, social and cultural factors. Thus, the latest models of creativity include the interaction of personal and contextual aspects to explain the phenomenon of creative expression. In the specific case of organizational culture, its influence on the manifestation of creativity would happen through the values. However, in spite of this relationship be frequently mentioned in the literature, they were not found empiric studies that relate the organizational values as antecedents of the organizational creativity. For data collection two scales were used: the Profiles of Organizational Values Inventory and the Support and Resistance to New Ideas Scale. The data was obtained from a sample of 2171 employees of a Brazilian bank. The relationship between values and organizational creativity was evaluated through regressions multiple stepwise. The results of this research corroborate the idea that the organizational values are important factors in the prediction of the support and of the resistance to the innovation in organizations. Autonomy, value that sends to the degree of freedom that the employee has to make decisions and to do their own choices, appeared as the best predictor of the support as of the resistance of the organization in accepting new ideas. Tradition and domain, correlated positively with the barriers to creativity in the workplace, appearing as counterpoint to the values that benefit the expression of creativity. This study contributes to a better understanding of the creativity predictors. Also confirming the practical applicability of this line of research -- incentives and barriers to creativity in organizational --, it enables the identification of those elements of the work context that need intervention in order to facilitate the manifestation of creativity in organizations. [ABSTRACT FROM AUTHOR]

Copyright of Revista de Economia e Sociologia Rural is the property of Sociedade Brasileira de Economia e Sociologia Rural and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

O objetivo deste estudo foi compreender as possíveis realções entre antecedentes e conseqüências da qualidade do relacionamento, lealdade e um indicador de resultado financeiro (LTR), sobre a pré-disposição de troca entre operadoras de telefonia celular. Com caráter metodológico quantitativo não-probabilístico e método hipotético-dedutivo. O estudo foi realizado com 493 usuários de telefonia celular. A base foi analisada com o uso de equação estrutural e regressão logística. Os resultados permitiram a comprovação parcial do modelo proposto em decorrência das particularidades dos grupos analisados. Foram confirmadas (direta e indiretamente) as premissas de impacto positivo e significante entre Satisfação, Confiança e Comprometimento, e seus antecedentes. Satisfação e Lealdade foram elementos distintivos entre os grupos com menor pré-disposição para troca de operadora. Estes resultados demonstraram algumas particularidades deste mercado, onde a oferta é percebida de forma homogênea pelos consumidores, fato que estimula a alta taxa de troca no Brasil. [ABSTRACT FROM AUTHOR]

Copyright of Revista de Economia e Sociologia Rural is the property of Sociedade Brasileira de Economia e Sociologia Rural and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The main goal of this paper is to evaluate the impact of the exchange rate volatility in price prediction of derivative securities in the Brazilian capital markets using an artificial neural network technique, given the Black & Scholes Model limitations. For this purpose a multiplayer, feedforward neural network, trained by the backpropagation algorithm model, to perform the prediction of the Telemar option prices was developed. The model results show that price estimates are close to the real values, mainly when appended to the exchange rate, confirming that the performance of neural network is superior to other results. The inclusion of the exchange rate in neural networks technique results in a better price forecasting for the options, because the volatility in the price of the underlying asset is caused by temporary arbitrage of quotes among the national and foreign stock markets where the company is listed. [ABSTRACT FROM AUTHOR]