Quantifying Long-term Scientific Impact

Comment on "Quantifying Long-term Scientific Impact"

The paper comments on “Quantifying long-term scientific impact”. It indicates that there is a mistake of [D. S. Wang, C. Song, A. L. Barabási. Quantifying long-term scientific impact, Science, 342, 127 (2013)].

Comment on “ Quantifying long - term scientific impact ”

Wang et al. (Reports, 4 October 2013, p. 127) claimed high prediction power for their model of citation dynamics. We replicate their analysis but find discouraging results: 14.75% papers are estimated with unreasonably large m (>5) and l (>10) and correspondingly enormous prediction errors. The prediction power is even worse than simply using short-term citations to approximate long-term citati...

Quantifying the Long-Term Impact of Negative Word of Mouth on Cash Flows and Stock Prices

T paper seeks to quantify the long-term financial impact of negative word of mouth (NWOM), an issue that has long challenged extant research. We do so with real-world data on firm security prices. The developed time-series models innovatively uncover (1) shortand long-term effects of NWOM on cash flows, stock returns, and stock volatilities, and (2) NWOM’s “wear-in” effects (i.e., it takes a nu...

Underpricing, Ownership and Liquidity of Initial Public Offers (IPO) and Their Impact on Performance of IPO Stocks in Equity Markets of India

Paper studies the impact of the liquidity, underpricing and ownership up on both the short term and long term performance of the Initial Public Offer (IPO) stocks in the equity markets of India. Empirical analysis is undertaken to study the impact of liquidity, underpricing and ownership on Performance of IPO stocks. Multiple regression analysis is undertaken for analyzing the impact. It is fou...

Short-term and Long-term Impact of Video-driven Metapragmatic Awareness Raising on Speech Act Production: A Case of Iranian Interme-diate EFL Learners