Point‐of‐Use Hybrid Inventory Policy for Hospitals

Modern point‐of‐use technology at hospitals has enabled new replenishment policies for medical supplies. One of these new policies, which we call the hybrid policy, is currently in use at a large U.S. Midwest hospital. The hybrid policy combines a low‐cost periodic replenishment epoch with a high‐cost continuous replenishment option to avoid costly stockouts. We study this new hybrid policy under deterministic and stochastic demand. We develop a parameter search engine using simulation to optimize the long‐run average cost per unit time and, via a computational study, we provide insights on the benefits (reduction in cost, inventory, and number of replenishments) that hospitals may obtain by using the hybrid policy instead of the commonly used periodic policies. We also use the optimal hybrid policy parameters from the deterministic analysis to propose approximate expressions for the stochastic hybrid policy parameters that can be easily used by hospital management.      

Retailer Transshipment versus Central Depot Allocation for Supply Network Design

We consider a supply chain structure with shipments from an external warehouse directly to retailers and compare two enhancement options: costly transshipment among retailers after demand has been realized vs. cost‐free allocation to the retailers from the development of a centralized depot. Stochastic programming models are developed for both the transshipment and allocation structures. We study the impact of cost parameters and demand coefficient of variation on both system structures. Our results show an increasing convex relationship between average costs and demand coefficient of variation, and furthermore that this increase is more pronounced for the allocation structure. We employ simulation and nonlinear search techniques to computationally compare the cost performance of allocation and transshipment structures under a wide range of system parameters such as demand uncertainty and correlation; lead times from the external warehouse to retailers, from warehouse to central depot, and from depot to retailers; and transshipment, holding, and penalty costs. The transshipment approach is found to outperform allocation for a broad range of parameter inputs including many situations for which transshipment is not an economically sound decision for a single period. The insights provided enable the manager to choose whether to invest in reducing lead times or demand uncertainty and assist in the selection of investments across identical and nonidentical retailers.     

Latent Tuberculosis Infection Screening Acceptability among Migrant Farmworkers

Latent tuberculosis (TB) infection is routinely diagnosed using the tuberculin skin test (TST). New methods of detection more specific than TST such as QuantiFERON TB Gold In‐Tube (QFT‐GIT) have been developed but evidence remains limited on their acceptability among migrant farmworkers. This article examined the acceptability of screening tests among migrant farmworkers working on the Arizona‐Mexico border. We conducted a cross‐sectional survey of migrant farmworkers via questionnaire. Of 83 participants interviewed, 53 (63.9%) believed that TB was a serious disease that could result in death and 59 (71.1%) considered TB a health concern in their community. Sixty‐four participants (77.1%) rated QFT‐GIT test as performing better than TST. Our study demonstrates preference for QFT‐GIT results over TST, and highlights migrant farmworkers’ considering themselves at risk of TB and TB as a health concern. Policies that create easy access and culturally appropriate, affordable healthcare for this vulnerable population should be encouraged.     

Effects of Multiple Exemplar Training on the Emergence of Derived Relations in Preschool Children Learning a Second Language

We evaluated the facilitative effects of multiple exemplar training (MET) on the establishment of derived tact relations in typically developing children. A multiple-probe design across stimulus sets was implemented to introduce MET. Participants were first taught to conditionally relate dictated names in English to their corresponding objects (listener behavior; A-B relations), followed by tests for derived tacts (B-A relations). If participants failed these tests, MET was implemented whereby tact relations were explicitly taught with novel stimulus sets, followed by test probes with the original training set. MET continued with novel stimuli until participants met criterion for the emergence of derived tact relations or after exposure to three MET sets. Results indicated failed tests for tact relations following direct training in listener relations, and marked improvements in derived tact relations following MET across all participants.     

Structural constraints in times of resource nationalism: oil policy and state capacity in post-neoliberal Ecuador

ABSTRACT

This article explores the re-emergence of resource nationalism in Ecuador during Rafael Correa’s government. In 2010, Ecuador pursued a shift in oil contracts from production sharing agreements to service contracts. I argue that resource nationalist policies were intended to maximize rent appropriation and increase state control. Nevertheless, in order to spell out the complexities of natural resource governance in post-neoliberal Ecuador, it is important to integrate the structural constraints of the Ecuadorian state to enact resource nationalist policies. Despite the nationalist sentiments that originated these reforms, the renegotiation of contracts continued to benefit foreign corporations due to the centralized attitude of the Correa government and the perennial limitations of state capacity in the regulation of the industry.     

An Evaluation of Train-to-Code to Teach Implementation of PECS©

We evaluated the impact of a customized training program developed using an observation and behavioral coding software system (i.e., Train-to-Code) to teach implementation of Phase 3A of the Picture Exchange Communication System to four undergraduate students. The training program coached participants on all relevant steps of the procedure. To accomplish this, participants viewed multiple video exemplars of correct and incorrect implementation of each step in the sequence of behaviors, and coded these behaviors in accordance with a taxonomy developed by the experimenters. The training program provided prompts and feedback in real time based on participants’ current level of performance and required mastery of seven levels of training, each with fewer prompts and feedback, until an expert level of unprompted coding performance was demonstrated. A multiple baseline design across participants was used to evaluate the effectiveness of the training program on levels of procedural integrity during performance test probes conducted with a confederate learner before and after the completion of the training program. Results showed improved performance relative to baseline following training, and maintenance of performance at 2–4 weeks follow-up. A conceptual analysis of these findings will be discussed, along with implications for staff training in applied settings.     

An Investigation of Stimulus Pairing and Listener Training to Establish Emergent Intraverbals in Children with Autism

The Analysis of Verbal Behavior - We examined two methods to facilitate the emergence of untaught intraverbal responses to children with autism. Listener behavior training (LT) involved...