Discontinuous Demand Functions: Estimation and Pricing

We consider a dynamic pricing problem with an unknown and discontinuous demand function. There is a seller who dynamically sets the price of a product over a multiperiod time horizon. The expected demand for the product is a piecewise continuous and parametric function of the charged price, allowing for possibly multiple discontinuity points. The seller initially knows neither the locations of the discontinuity points nor the parameters of the demand function but can infer them by observing stochastic demand realizations over time. We measure the seller’s performance by the revenue loss relative to a clairvoyant who knows the underlying demand function with certainty. We construct a dynamic estimation-and-pricing policy that accounts for demand discontinuities, derive the convergence rates of discontinuity- and parameter-estimation errors under this policy, and prove that it achieves near-optimal revenue performance. We also extend our analysis to the cases of time-varying demand discontinuities and inventory constraints

Antibacterial efficacy of copper-added chitosan nanoparticles: A confocal laser scanning microscopy analysis

The aim of this study was to evaluate the antibacterial efficacy of copper added chitosan nanoparticles (CU-CNPs) as an irrigation solution with different irrigants in terms of eliminating Enterococcus Faecalis (E. faecalis) from the root canals. Fifty mandibular premolar teeth were prepared and infected with E. faecalis for 21 days. After the incubation period, samples were randomly divided into a control group irrigated with distilled water and 4 experimental groups (n = 10) irrigated with as follows, %6 NaOCl, %6 NaOCl + %9 editronate (HEBP), Chitosan nanoparticles (CNPs), and CU-CNPs. To calculate the proportion of dead E. faecalis cell volume, stained using LIVE/DEAD BacLight Bacterial Viability Kit and were scanned using confocal laser scanning microscope (CLSM). All the irrigation solutions significantly (P < .05) killed the bacteria in the canal, except for the control group. CU-CNPs solution killed the highest (P < .05) number of bacteria compared with the other experimental groups. No significant difference was found between CNPs, NaOCl + HEBP, and NaOCl in terms of antibacterial activity. CU-CNPs solution was exhibited higher antibacterial efficacy against E. faecalis

Dynamic Learning and Market Making in Spread Betting Markets With Informed Bettors

10.2139/ssrn.3283392SSRN Electronic Journa

Organizational humor as making our work more meaningful: mediation by crafting job resources

In the present study, we examined the impact of humor’s positive functions on the perception of a job’s meaningfulness. We argued that liberating and stress-relieving humor act as job resources enhancing job crafting to increase social and structural resources to experience meaningfulness. We hypothesized that crafting the job to increase structural and social resources would mediate the link between organizational humor functions (i.e., liberating and stress-relieving) and meaningfulness. We conducted a cross-sectional study among 200 Turkish employees from different occupations. Our results revealed that increasing structural resources mediated the relationship between liberating humor and meaningfulness, while this mediation was partially for stress-relieving humor. The mediating role of increasing social resources was partial and conditional for both types of organizational humor functions. The practical and theoretical implications have been discussed from a positive organizational scholarship perspective.WOS:0008576993000012-s2.0-85139486984Social Sciences Citation Index - Arts and Humanities Citation IndexQ4ArticleUluslararası işbirliği ile yapılmayan - HAYIRSeptember2022YÖK - 2022-23Eki