We study the effects of reputation and competition in a stylized market for experience goods. If interaction is anonymous, such markets perform poorly: sellers are not trustworthy, and buyers do not trust sellers. If sellers are identifiable and can, hence, build a reputation, efficiency quadruples but is still at only a third of the first best. Adding more information by granting buyers access...

Abstract We categorify the commutation of Nakajima’s Heisenberg operators $P_{\pm 1}$ and their infinitely many counterparts in quantum toroidal algebra $U_{q_1,q_2}(\ddot {gl_1})$ acting on Grothendieck groups Hilbert schemes from [10, 24, 26, 32]. By combining our result with [26], one obtains a geometric categorical action derived category schemes. Our main technical tool is detailed study c...

This study aims to propose an effective fire suppression strategy for piloti buildings based on the hazard analysis of building fires, prior research, and a perception survey officials. The use combustible materials in architecture poses risk rapid combustion, which may cause ground entrances lose their evacuation function because flames. Based results this study, piercing applicators cellar no...

Changes in transport costs can affect mobility ways that differ across the population, affecting impacts of policies. We randomly assign large price reductions on Uber Egypt over a 3-month period and collect comprehensive data participant using Google Timeline. A 50% reduction quadruples usage induces 42% increase total travel. Effects welfare gains are larger for women, who less mobile at base...

We present high accuracy relativistic coupled cluster calculations of the first and second ionisation potentials electron affinity heaviest element in Periodic Table, Og. The results were extrapolated to basis set limit augmented with higher order excitations (up perturbative quadruples), Breit contribution, QED self energy vacuum polarisation corrections. have performed an extensive investigat...