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In order to test for weak form efficiency in the market a vast pool of individual stocks must be analyzed rather than a stock market index. In this paper, a model-based bootstrap is used to generate a series of simulated trials and a modified chart pattern recognition algorithm is applied to all stocks listed on the Toronto Stock Exchange (TSX). The number of patterns detected in the original price series is compared with the number of patterns found in the simulated series. By simulating the price path specific time dependencies present in real data are eliminated, making price changes purely random. Patterns, if consistently identified, carry information which adds value to the investment process, however, this informativeness does not guarantee profitability. Conclusions are drawn on the relative efficiency of some sectors of the economy. Although the null hypothesis of weak form efficiency on the TSX cannot be rejected, some sectors of the Canadian economy appear to be less efficient than others. In addition, pattern frequencies appear to be negatively dependent on the two moments of return distributions, variance and kurtosis. 相似文献
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This study about Italian producers of machines and plants for pasta, basic cereals, snacks and bread factories attempts to shed some light on the role played by small and medium-sized enterprises (SMEs) in the Italian industry. Even if the high diffusion of SMEs has positively affected the performance of Italian economy during the seventies and the eighties, the new trends of technological change and global competition are expected to be unfavourable to this category of enterprises in the nineties. The analyses of a significant sample of firms makes clear that the industry is in the middle of a positive restructuring process. The structure of this sector shows a division of labour based on deverticalization of production, and a process of internationalization focused on exports and not on direct investments or joint ventures abroad. Leading firms are following growth strategies by new investments and acquisitions. Finally, as far as technological change is concerned, there is a significant increase of process innovations, thanks to the use of electronic components.An earlier release of this paper was presented at 7th EARIE (European Association for Research in Industrial Economics) Annual Conference in Lisbon, September 2–4 1990. We thank all the participants for their comments and suggestions, in particular P. Dunne. 相似文献
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Gabriele Tedeschi Stefania Vitali Mauro Gallegati 《Journal of Evolutionary Economics》2014,24(4):817-834
In this paper, we introduce an agent-based model where heterogeneous firms compare and modify their innovation strategies, so generating an evolving network structure. By implementing dynamic behavioral switching via a fitness mechanism based on agents’ performance, companies can endogenously modify their tactics for technological change and switch among three groups: stand-alone innovators, collaborative innovators and imitators. On the one hand, we study the properties of the emerging networks and we show that they reproduce the stylized facts of innovation networks. Moreover, we focus the analysis on the impact of these three innovation categories on the macro economic aggregate, finding that collaborative companies are those having the highest positive impact on the economic system. On the other hand, we use the model to study the effect of different economic innovation policies in increasing macroeconomic performance. 相似文献
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The question of which factors determine corporate bonds pricing is investigated by analysing the spreads of eurobonds issued by major G-10 companies during the 1991–2001 period. Three main results emerge from the analysis. First, bond ratings appear as the most important determinant of yield spreads, with investors’ reliance on rating agencies judgments increasing over time. Second, the primary market efficiency and the expected secondary market liquidity are not relevant explanatory factors of spreads cross-sectional variability. Finally, rating agencies adopt a different, ‘through the cycle’, evaluation criteria of default risk with respect to the forward looking one adopted by bond investors. 相似文献
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We compare two commonly used mechanisms in public procurement: auctions and negotiations. The execution of the procurement mechanism is delegated to an agent of the buyer. The agent has private information about the buyer's preferences and may collude with one of the sellers. We provide a general characterization of both mechanisms based on public scrutiny requirements and show—contrary to conventional wisdom—that an intransparent negotiation always yields higher social surplus than a transparent auction. Moreover, there exists a lower bound on the number of sellers such that the negotiation also generates a higher buyer surplus. 相似文献
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Judith Fletcher-Brown Sarah Turnbull Giampaolo Viglia Tom Chen Vijay Pereira 《International Journal of Research in Marketing》2021,38(2):518-529
Technology may facilitate health and wellbeing consumer engagement. When there is scant public health provision and socio-cultural norms marginalize consumers stigmatized from cancer, we reveal how a brand’s corporate social media campaign can support vulnerable consumers with resource constraints. Drawing from a transformative consumer research lens, we investigate five years of computer-mediated communications facilitated by the Indian brand Dabur Vatika. Through a grounded theory and an abductive reasoning approach, we unveil how vulnerable consumers directly or indirectly affected by cancer leverage brand's social media to replenish resources. First, we identify how vulnerable consumers engage to replenish depleted emotional and social support resources. We further expand consumer engagement scholarship by offering a preliminary definition of “vulnerable consumer engagement”. Second, we provide a nascent classification of vulnerable consumers in a consumer-producer role, Principal Vulnerable Consumers and Associate Vulnerable Consumers, distinguished by their proximity to the vulnerable context. Lastly, we reveal how brands may perform a transformative role, to replenish social, emotional and operant resources at the micro level through the engagement of vulnerable consumers with corporate social media. This insight is informative for policymakers, advertising practitioners and transformative consumer research academics. 相似文献
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In this research we use a data-base that reveals the propensity for contractual ventures and direct investments (1051 operations) of the clothing Italian companies during the period 1987–1991, on a national (342 operations) and international level (709 operations). The latter were analyzed with reference to the internal (412) and external growth strategies (297), cooperative (362) and non-cooperative (347) deals. Our analysis focuses on the different strategies that SMEs, on one hand, and large companies, on the other hand, show in the internationalization process. Main results of the study are: the international growth of the SMEs takes place mainly through contractual agreements (68%), more so than with non-cooperative operation (32%), whereas in large companies the non-cooperative strategies slightly prevail (54%). Consequently, the external growth strategy is very important for the SMEs (72%) and somewhat less important for the large companies (54%); the cooperative growth is usually seen by SMEs as an expansion both of the commercial (48% of the operations involves commercial purposes) and of the production areas (48% of the cases). This could indicate that SMEs try to organize on an international level the same network model used in Italy: SMEs decentralize their production within the country through networks of companies and industrial districts, whose horizontal connections (among SMEs themselves) and vertical connections (with large companies) provide flexibility and low costs; large companies' expectations of the Single European Market have brought a great number of international operations in Europe (24%), notwithstanding the notable importance of Japan (23%) and U.S. (17%); on the contrary, SMEs focus on “niche and rich markets” as Japan (40%); but as far as the contractual agreements are concerned, both types of firm privilege the Japanese market: almost 50% of SMEs' international agreements are directed towards Japan (33% in the large company's case); large companies and SMEs in the middle and high segments of the market carry out more operations than companies operating in the low quality and casual segments; generally speaking, in Italy there is an urgent need for industrial policies promoting SMEs access to cooperative instruments (“learning by cooperating”). 相似文献
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Massimo Matthias Michele Giammarino Giampaolo Gabbi 《Journal of International Financial Management & Accounting》2019,30(3):203-222
This paper asks how well the use of quantitative and qualitative variables can improve the assessment of companies' creditworthiness and how this result can be influenced by the economic and financial peculiarities of countries. We harden qualitative variable measures to model soft information aimed at scoring microfirms, small, and medium‐sized firms. The structural survey covers Germany, Italy, and the UK in a sample of about 17 thousand companies observed during the financial crisis. Soft facts are determined within the balanced scorecard framework in order to find out the impact of customers, business processes, learning and growth, and financial perspectives. Our findings show that credit models integrating soft variables optimize the risk estimation, but estimates are country‐specific and should be tailored to the characteristics of each economic system. 相似文献
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Giampaolo Arachi 《International Tax and Public Finance》2001,8(2):171-188
This note shows that residence- and source-based taxes on capital income are not sufficient to sustain an efficient Nash equilibrium when several goods are internationally traded, apart from two special cases. With several traded commodities, domestic fiscal policies affect foreign welfare not only through changes in the world interest rate but also through changes in the equilibrium relative prices of traded commodities. In order to guarantee the existence of an efficient Nash equilibrium in the general case, additional tax instruments are required. In particular, destination-based taxes on traded commodities are needed to enable the government to control the relative commodity prices faced by domestic consumers. In addition, in order to shield domestic producers from changes in world prices, the government must levy either origin-based commodity taxes or taxes on the immobile factors. 相似文献