Search results for " returns"
showing 10 items of 33 documents
Measuring investor sentiment in the stock market
2011
Recently, investor sentiment measures have become one of the more widely examined areas in behavioral finance. A number of measures have been developed in the literature without having been fully validated, and therefore leaving in question which measure should be used for empirical exploration. The purpose of this study is to examine the relative performance of a number of popular measures in predicting stock returns and to test the relative efficacy of a hybrid approach. Using a panel of investor sentiment measures, we develop a new measure of sentiment which combines direct and indirect sentiment measures. Our results show that our composite sentiment index affects the returns of stocks …
Hospital performance: Efficiency or quality? Can we have both with IT?
2015
This paper explores influence of IT investment on hospital efficiency and quality.There is a direct effect of IT investment on service quality in hospitals.There is a moderating effect of quality on operational efficiency in hospitals.There is a U-shaped relationship between IT investments and operational efficiency.IT investments have diminishing returns beyond a certain point. The influence of IT investment on hospital efficiency and quality are of great interest to healthcare executives as well as insurers. Few studies have examined how IT investments influence both efficiency and quality or whether there is an optimal IT investment level that influences both in the desired direction. De…
Il dibattito sul canone delle donne e le sue ricadute. Qualche annotazione
2023
Questo breve contributo torna a riflettere intorno al dibattito sul canone letterario italiano e la scrittura delle donne degli ultimi trent’anni: un fecondo conflitto delle idee che consente ormai di ripensare modi e criteri di selezione e trasmissione dei testi letterari italiani.
Sraffa and the problem of returns: a view from the Sraffa archive
2022
About a quarter of a century ago, Carlo Panico and one of the authors of this chapter published a paper on ‘Sraffa, Marshall and the problem of returns’ (EJHET 1994) in which they explored links between Sraffa’s mid-1920s critique of Marshallian economics and the analysis developed some 35 years later in Production of Commodities. The 1994 contribution focused exclusively on Sraffa’s published works since his unpublished manuscripts were not yet freely accessible. With the benefit of hindsight, it may be claimed that Sraffa was a scholar who, during his lifetime, published little but wrote a lot (Kurz, 2008). Hence, when in December 1994 Trinity College Cambridge, UK, opened the Sraffa Arch…
“Piero Sraffa: economic reality, the economist and economic theory. An interpretation”.
2007
We carry out a textual analysis of Sraffa's main published contributions to pure economics in order to elaborate a rational reconstruction of an aspect of Sraffa's implicit methodology which has not yet been duly investigated. We refer to the threefold relationship between ‘economic reality’, ‘the economist/observer’ and ‘economic theory’. We elucidate the constraints which, for Sraffa, should bind the economists' arbitrariness and we trace the elements of continuity and evolution from the 1925–6 critique of Marshallian economics to Production of Commodities.
Method and analysis in Piero Sraffa's 1925 critique of Marshallian economics
2000
This paper provides an analysis of the logical structure and analytical content of Piero Sraffa's 1925 Italian paper, ‘Sulle relazioni fra costo e quantita prodotta’. It shows that Sraffa's criticism of the supply side of Marshall's theory of value in a competitive partial equilibrium model involves analytical and methodological issues. Endorsing an agressive methodology Sraffa logically reconstructs Marshall's model on variable returns to determine its empirical domain. He demonstrates that the latter encompasses only the empirically irrelevant cases of specific factor industries and specific external economies industries and that it cannot be generalized to non-specific factor industries …
Monotone Concave Operators: An application to the existence and uniqueness of solutions to the Bellman equation
2008
We propose a new approach to the issue of existence and uniqueness of solutions to the Bellman equation, exploiting an emerging class of methods, called monotone map methods, pioneered in the work of Krasnosel’skii (1964) and Krasnosel’skii-Zabreiko (1984). The approach is technically simple and intuitive. It is derived from geometric ideas related to the study of fixed points for monotone concave operators defined on partially order spaces.
Intellectual property strategies and firm growth : evidence from Finnish small business data
2012
The goal of this study is to shed light on the relationship between intellectual property (IP) strategies and firm growth. In brief, IP strategies are means of capturing returns on innovation investments. Employment effects and sales growth effects of innovations have been studied extensively in both theoretical and empirical economic literature but prior research has seldom included IP strategies into the analysis. There is little knowledge, whether there exists growth rate differences among firms that use different IP strategies and do patenting firms effectively demonstrate stronger growth than their non-patenting counterparts. Present study considers IP strategies as potential firm grow…
Do Investors Care About Noise Trader Risk?
2011
International audience; The link between investor sentiment and asset valuation is at the center of a long-running debate in behavioral finance. Using a new composite sentiment indicator, we show that the conventional risk does not explain the abnormal returns of portfolios most sensitive to the sentiment factor. Our result supports the existence of a sentiment risk valued by financial markets. We also find that the firms more impacted by the sentiment risk correspond to difficult-to-arbitrage and hard-to-value stocks, e.g. small stocks, growth stocks, young stocks, unprofitable stocks, lower dividend-paying stocks, intangible stocks and high volatility stocks.
Is Sentiment Risk Priced By Stock Market?
2012
International audience; This study tests if the financial markets price the investors sentiment risk. We construct portfolios based upon the stock returns exposure to sentiment. Our results show that the portfolio returns are positively correlated with the exposure of stocks to sentiment. The strategy that consists of buying stocks with the highest exposure to sentiment and selling stocks with the lowest exposure to sentiment generates a significant raw profit. Exploring the sources of profit, we find that neither the traditional risk factors nor the momentum factor can account for the profit. However, we find that the addition of the sentiment risk premium contributes to explain the profit.