We examine the practice of share repurchases in UK from 2000 to 2016 find that an important regulatory reform 2003, which relaxed previously strict rules about repurchases, was followed by a significant increase repurchase activity main-market listed firms then motivation for testing several key hypotheses prior literature. Our analysis 6,228 firm years provides support, across both regimes, fr...

Proactive Secret Sharing Scheme (PSSS) is a method to periodically renew n secret shares in a (k, n) threshold-based Secret Sharing Scheme without modifying the secret or reconstructing the secret to reproduce new shares. Given enough time, a hacker may be able to compromise enough shares (k or more) to gain the secret. PSSS is a scheme that allows generating new set of shares for the same secr...

Cheater detection and identification are important issues in the process of secret reconstruction. To detect and identify cheaters most of the algorithms need the dealer to generate and distribute additional information to shareholders. Recently, algorithms have been proposed to detect and identify cheaters. If more than t (i.e. the threshold) shares, for example j (i.e. t < j) shares in the se...

This paper highlights the previously neglected role of the futures markets in US Treasury price discovery. The estimates of 5and 10-year GovPX spot market information shares typically fail to reach 50% from 1999 on. The GovPX information shares for the 2-year contract are higher than those of the 5and 10-year maturities but also decline after 1998. Relative bid-ask spreads, number of trades, an...

In a column whose chosen focus is on ‘business’ and ‘health care in Canada’, we would be remiss to overlook Valeant. The complex narrative of this precipitous fall is just so rich with fodder. While each step in the saga could serve as a springboard for discussion (mergers and acquisitions, short-seller attacks, senate investigations, price gouging, questionable accounting practices, hedge fund...

We consider the problem of fairly allocating indivisible goods, focusing on a recently-introduced notion of fairness called maximin share guarantee: Each player’s value for his allocation should be at least as high as what he can guarantee by dividing the items into as many bundles as there are players and receiving his least desirable bundle. Assuming additive valuation functions, we show that...

Recent reports suggest that most of the world's commercial fisheries could collapse within decades. Although poor fisheries governance is often implicated, evaluation of solutions remains rare. Bioeconomic theory and case studies suggest that rights-based catch shares can provide individual incentives for sustainable harvest that is less prone to collapse. To test whether catch-share fishery re...

OBJECTIVE To quantify the effects of household expenditure survey characteristics on the estimated share of a household's expenditure devoted to health. METHODS A search was conducted for all country surveys reporting data on health expenditure and total household expenditure. Data on total expenditure and health expenditure were extracted from the surveys to generate the health expenditure s...

A WWF/Oxfam discussion paper-Alex Evans Purpose This discussion paper is intended to contribute to the evolving debate on the links between resource scarcity and international development, in particular by focusing on the issues of equity and " fair shares " for poor people and poor countries that arise in the context of resource limits and environmental boundaries. It provides a short overview...

We develop a certified decision procedure for reasoning about systems of equations over the “tree share” fractional permission model of Dockins et al. Fractional permissions can reason about shared ownership of resources, e.g. in a concurrent program. We imported our certified procedure into the HIP/SLEEK verification system and found bugs in both the previous, uncertified, decision procedure a...