송준 교수

Abstract This article describes the synthesis and characterization of polyisobutylene (PIB) carrying one primary hydroxyl head group and a tertiary chloride end group, [PhC(CH 3 )(CH 2 OH)–PIB–CH 2 C(CH 3 ) 2 Cl] prepared with direct functionalization via initiation. The polymerization of isobutylene was initiated with the α‐methylstyrene epoxide/titanium tetrachloride system. Living conditions were obtained from −75 to −50 °C (198–223 K). Low molecular weight samples (number‐average molecular

ABSTRACT In solution‐processed organic light‐emitting diodes (OLEDs), carrier injection imbalance and interfacial quenching persist as major hurdles, primarily due to the hole‐dominated transport in polymer‐based emitters. Here, we introduce a simple but highly effective post‐fabrication strategy for enhancing charge balance and device performance by chemically modifying ZnO nanoparticles (ZnO‐NPs) through acetone immersion. This treatment selectively passivates oxygen vacancy–related trap state

This book makes general considerations regarding global changes and contemporary economic issues in Asian countries in real terms.

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Perks are a commodity bundle offered by an employer to an employee. We provide two dynamic models. First, we assume non-separable utility function between effort and both of a perk good and money, extending Bennardo, Chiappori and Song (2010). There are two forces affecting the incentive compatibility constraint: higher promised utility makes the incentive compatibility constraint more binding, and if the higher promised utility is too costly then a principal may reduce the implemented effort. W

This paper considers incentive-constrained efficient contractual matching of individuals in the presence of moral hazard. By considering an economy with finite number of individuals, this paper shows what were assumed away in continuum models. Contract arbitrageurs specializing in writing (randomized) contracts, insurers, a market for lotteries on contracts, Lindahl-like prices for the lotteries, and a public randomization device are required for the incentive-constrained efficiency. The public

Summary Form only given, as follows. In a transverse magnetic field a tenuous plasma beam follows a curved Lorentzian trajectory. In contrast, a collisionless dense beam propagates undeflected by collective plasma processes including diamagnetic flux exclusion and the E*B drift. In recent laboratory and space experiments the magnetic field has been observed to diffuse much more rapidly than classically predicted, even in the limit of high beta and small ion gyroradius where diamagnetic flux excl

This paper revisits the claim that public provision of in-kind transfer is more efficient than transfers in cash. A simple job search model suggests that moral hazard would become more severe if recipients can save the transfer payment privately (the hidden saving problem), inducing them to make less effort to find jobs (that is, double deviation problem). We show that because the hidden saving problem always exists, economic efficiency requires overprovision of in-kind transfers and undersupply

In a simple static model of differentiated experience goods supplied by a single seller, we show that both a uniform price equilibrium and a price signalling equilibrium coexist. This is in contrast to the received wisdom that price signalling of quality is nonviable in static settings. We also show that the seller’s profit is always higher in the price signalling equilibrium than in the uniform price equilibrium, but the consumer surplus and social welfare may be higher in either equilibrium de