introduction: coronal microleakage may significantly reduce the prognosis of endodontic treatment. temporary restorative materials have a crucial role in preventing the infection of root canals between and after endodontic treatment. this in vitro study was designed to evaluate the coronal microleakage of three temporary restorative materials used in endodontics: coltosol, cavisol and cina. mat...

provisional cements are commonly used to facilitate retrievability of cement-retained fixed implant restorations; but compromised abutment preparation may affect the retention of implant-retained crowns.the purpose of this study was to investigate the effect of abutment design and type of luting agent on the retentive strength of cement-retained implant restorations.two prefabricated abutments ...

Over the past twenty-five years, states have developed elaborate regulatory systems to govern lawful marijuana markets. In designing these systems, assumed that Dormant Commerce Clause (“DCC”) does not apply; Congress, after all, has banned all commerce in marijuana. However, states’ reprieve from doctrine may soon come an end. Congress is on verge of legalizing federally, and once it does, wil...

Extended Abstract Electronic exchanges have enhanced the viability of secondary markets including markets for used books. Online used book markets offer a wider selection, lower search costs, and significantly lower prices than do physical used bookstores. The increased viability of online used book markets has caused concern among groups such as the Book Publishers Association and Author's Gui...

The blossoming digital economy provides many golden opportunities for small businesses. However, two sets of issues have a significant impact on competition in electronic markets: one is the cost of technology infrastructure, the other is information asymmetry. These problems may lead to a market of natural monopolies with a few well-established brand names in the digital economy. Therefore, we...

1. Overview and Summary The term price dispersion is commonly used to refer to firms in the same market selling identical goods for different prices at the same time. Since the early conjecture by Bakos (1997) that electronic markets are likely to feature lower price dispersion on account of lower search costs, a number of researchers have studied how information technology alters the observed ...

This research attempts to develop a conceptual foundation for authentication in electronic markets by drawing upon the well-known principal-agent theory in Economics. First, principal-agent theory is discussed and related to authentication in electronic markets. Then, the technologies and business functionalities that are currently available to support authentication in electronic markets are e...

The paper proposes a new perspective on value creation in the information age. At first there will be a brief analysis of the current developments in the field of Electronic Markets and Electronic Commerce. Then the fundamental shifts in value creation will be illustrated using the financial industry sector. At the end a new framework for Business Media will be introduced.