scholarly journals Mutual Cooperation and Tolerance to Defection in the Context of Socialization: The Theoretical Model and Experimental Evidence

2021 ◽  
Author(s):  
T. S. Kozitsina ◽  
I. V. Kozitsin ◽  
I. S. Menshikov
Keyword(s):  
Experimental Data ◽  
Nash Equilibrium ◽  
Theoretical Model ◽  
Experimental Evidence ◽  
Quantal Response ◽  
Mutual Cooperation ◽  
Theoretical Concepts ◽  
Before And After ◽  
Low Levels ◽  
Markov Strategies

Abstract The study of the nature of human cooperation still contains gaps needing investigation. Previous findings reveal that socialization effectively promotes cooperation in the well-known Prisoner’s dilemma (PD) game. However, theoretical concepts fail to describe high levels of cooperation (probability higher than 50%) that were observed empirically. In this paper, we derive a symmetrical quantal response equilibrium (QRE) in PD in Markov strategies and test it against experimental data. Our results indicate that for low levels of rationality, QRE manages to describe high cooperation. In contrast, for high rationality QRE converges to the Nash equilibrium and describes low-cooperation behavior of participants. In the area of middle rationality, QRE matches the curve that represents the set of Nash equilibrium in Markov strategies. Further, we find that QRE serves as a dividing line between behavior before and after socialization, according to the experimental data. Finally, we successfully highlight the theoretically-predicted intersection of the set of Nash equilibrium for PD in Markov strategies and the QRE curve.

Official Advice Improves Mortgage-Holders’ Perceptions of Switching: Experimental Evidence

2019 ◽  
Author(s):  
Shane Timmons
Keyword(s):  
Interest Rate ◽  
Experimental Evidence ◽  
Consumer Protection ◽  
Policy Development ◽  
Switching Process ◽  
Competitive Markets ◽  
Protection Agency ◽  
Change Perceptions ◽  
Before And After ◽  
The Individual

Encouraging consumers to switch to lower-rate mortgages is important both for the individual consumer’s finances and for functioning competitive markets, but switching rates are low. Given the complexity of mortgages, one potential regulatory intervention that may increase switching rates is to provide independent advice on how to select good mortgage products and how to navigate the switching process. Working with a government consumer protection agency, we conducted an experiment with mortgage-holders to test whether such advice alters perceptions of switching. The experiment tested how (i) the attributes of the offer, (ii) perceptions about the switching process, (iii) individual feelings of competence and (iv) comprehension of the product affect willingness to switch to better offers, both before and after reading the official advice. The advice made consumers more sensitive to interest rate decreases, especially at longer terms. It also increased consumers’ confidence in their ability to select good offers. Overall, the findings imply that advice from policymakers can change perceptions and increase switching rates. Moreover, the experiment demonstrates how lab studies can contribute to behaviourally-informed policy development.

Convective Losses From Cavity Solar Receivers—Comparisons Between Analytical Predictions and Experimental Results

1983 ◽  
Vol 105 (1) ◽  
pp. 29-33 ◽  
Author(s):  
A. M. Clausing
Keyword(s):  
Experimental Data ◽  
Experimental Evidence ◽  
Analytical Model ◽  
Excellent Agreement ◽  
Experimental Results ◽  
Simple Analytical Model ◽  
Refined Model ◽  
Wall Area

Cavity solar receivers are generally believed to have higher thermal efficiencies than external receivers due to reduced losses. A simple analytical model was presented by the author which indicated that the ability to heat the air inside the cavity often controls the convective loss from cavity receivers. Thus, if the receiver contains a large amount of inactive hot wall area, it can experience a large convective loss. Excellent experimental data from a variety of cavity configurations and orientations have recently become available. These data provided a means of testing and refining the analytical model. In this manuscript, a brief description of the refined model is presented. Emphasis is placed on using available experimental evidence to substantiate the hypothesized mechanisms and assumptions. Detailed comparisons are given between analytical predictions and experimental results. Excellent agreement is obtained, and the important mechanisms are more clearly delineated.

Protein supplementation of silage for ewes in late pregnancy

1996 ◽  
Vol 1996 ◽  
pp. 47-47
Author(s):  
J.E. Vipond ◽  
M. Lewis ◽  
G.M. Povey
Keyword(s):  
Experimental Evidence ◽  
Litter Size ◽  
Crude Protein ◽  
Late Pregnancy ◽  
Protein Supplementation ◽  
Energy Requirements ◽  
Grass Silage ◽  
Condition Score ◽  
Low Levels ◽  
The Uk

Ewes fed good quality grass silage need low levels (0.4-0.6 kg/d) of concentrate supplement to satisfy energy requirements in late pregnancy. However, the UK Metabolisable Protein (MP) system predicts that using a low level of a typical 180 g/kg crude protein (CP) compound will result in an undersupply of MP and therefore a higher digestible undegradable protein (DUP) content of compounds is required. Although the benefits of supplying additional DUP to lactating ewes are well established there is little or no experimental evidence to support the practice of supplementing silage based diets with supplementary DUP. The objective of the experiment was to evaluate the response to supplementary DUP in silage based diets.One hundred and twenty five scanned Scotch Mule ewes were synchronised, mated to Texel rams and allocated to 5 treatments balanced for liveweight, condition score, litter size, and parity. Five supplements were formulated to supply varying amounts of DUP and eRDP.

Psychophysical interactions with a double-slit interference pattern: Exploratory evidence of a causal influence

2021 ◽  
Vol 34 (1) ◽  
pp. 79-88
Author(s):  
Dean Radin ◽  
Helané Wahbeh ◽  
Leena Michel ◽  
Arnaud Delorme
Keyword(s):  
Experimental Data ◽  
Interference Pattern ◽  
Type I Error ◽  
Human Mind ◽  
The Other ◽  
Type I ◽  
Fringe Visibility ◽  
Future Studies ◽  
Before And After ◽  
Double Slit

An experiment we conducted from 2012 to 2013, which had not been previously reported, was designed to explore possible psychophysical effects resulting from the interaction of a human mind with a quantum system. Participants focused their attention toward or away from the slits in a double-slit optical system to see if the interference pattern would be affected. Data were collected from 25 people in individual half-hour sessions; each person repeated the test ten times for a total of 250 planned sessions. “Sham” sessions designed to mimic the experimental sessions without observers present were run immediately before and after as controls. Based on the planned analysis, no evidence for a psychophysical effect was found. Because this experiment differed in two essential ways from similar, previously reported double-slit experiments, two exploratory analyses were developed, one based on a simple spectral analysis of the interference pattern and the other based on fringe visibility. For the experimental data, the outcome supported a pattern of results predicted by a causal psychophysical effect, with the spectral metric resulting in a 3.4 sigma effect (p = 0.0003), and the fringe visibility metric resulting in 7 of 22 fringes tested above 2.3 sigma after adjustment for type I error inflation, with one of those fringes at 4.3 sigma above chance (p = 0.00001). The same analyses applied to the sham data showed uniformly null outcomes. Other analyses exploring the potential that these results were due to mundane artifacts, such as fluctuations in temperature or vibration, showed no evidence of such influences. Future studies using the same protocols and analytical methods will be required to determine if these exploratory results are idiosyncratic or reflect a genuine psychophysical influence.

The structure of the Cincinnati arch as determined by short period Rayleigh waves

1969 ◽  
Vol 59 (1) ◽  
pp. 399-407
Author(s):  
Robert B. Herrmann
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Layer Thickness ◽  
Rayleigh Waves ◽  
Layer Model ◽  
Depth Data ◽  
Short Period ◽  
Best Fitting ◽  
Good Agreement

Abstract The propagation of Rayleigh waves with periods of 0.4 to 2.0 seconds across the Cincinnati arch is investigated. The region of investigation includes southern Indiana and Ohio and northern Kentucky. The experimental data for all paths are fitted by a three-layer model of varying layer thickness but of fixed velocity in each layer. The resulting inferred structural picture is in good agreement with the known basement trends of the region. The velocities of the best fitting theoretical model agree well with velocity-depth data from a well in southern Indiana.

Implementation of a Standardized Perioperative Pain Management Protocol to Reduce Opioid Prescriptions in Otolaryngologic Surgery

2022 ◽  
pp. 019459982110711
Author(s):  
Michael T. Chang ◽  
M. Lauren Lalakea ◽  
Kimberly Shepard ◽  
Micah Saste ◽  
Amanda Munoz ◽  
...  
Keyword(s):  
Pain Management ◽  
Postoperative Pain ◽  
Lower Amount ◽  
Opioid Use ◽  
Protocol Implementation ◽  
Perioperative Pain ◽  
Management Protocol ◽  
Before And After ◽  
Perioperative Pain Management ◽  
Low Levels

Objective To evaluate the efficacy of implementing a standardized multimodal perioperative pain management protocol in reducing opioid prescriptions following otolaryngologic surgery. Study Design Retrospective cohort study. Setting County hospital otolaryngology practice. Methods A perioperative pain management protocol was implemented in adults undergoing otolaryngologic surgery. This protocol included preoperative patient education and a postoperative multimodal pain regimen stratified by pain level: mild, intermediate, and high. Opioid prescriptions were compared between patient cohorts before and after protocol implementation. Patients in the pain protocol were surveyed regarding pain levels and opioid use. Results We analyzed 210 patients (105 preprotocol and 105 postprotocol). Mean ± SD morphine milligram equivalents (MMEs) prescribed decreased from 132.5 ± 117.8 to 53.6 ± 63.9 ( P < .05) following protocol implementation. Mean MMEs prescribed significantly decreased ( P < .05) for each procedure pain tier: mild (107.4 to 40.5), intermediate (112.8 to 48.1), and high (240.4 to 105.0). Mean MMEs prescribed significantly decreased ( P < .05) for each procedure type: endocrine (105.6 to 44.4), facial plastics (225.0 to 50.0), general (160.9 to 105.7), head and neck oncology (138.6 to 77.1), laryngology (53.8 to 12.5), otology (77.5 to 42.9), rhinology (142.2 to 44.4), and trauma (288.0 to 24.5). Protocol patients reported a mean 1-week postoperative pain score of 3.4, used opioids for a mean 3.1 days, and used only 39% of their prescribed opioids. Conclusion Preoperative counseling and standardization of a multimodal perioperative pain regimen for otolaryngology procedures can effectively lower amount of opioid prescriptions while maintaining low levels of postoperative pain.

Development of a Methodology for the Evaluation of Motion Sickness Incidence in Railways

2013 ◽  
Author(s):  
Claudio Braccesi ◽  
Filippo Cianetti ◽  
Renzo Scaletta
Keyword(s):  
Experimental Data ◽  
Theoretical Model ◽  
Motion Sickness ◽  
Evaluation Method ◽  
Low Frequency ◽  
Comparison With Experimental Data

The present paper illustrates an evaluation method developed by the authors to quantify the index of motion sickness incidence (MSI) in railways motion conditions. This index is formerly defined in literature to quantify diseases coming from low frequency motions (kinetosis). The proposed method, suggested as alternative to the only one existing in reference norm, involves PCT index, well known in railways context, and weighting curves for accelerometric signals, which are also specified in railways regulations. The approach of the method, consistent with the theoretical model, developed by the authors themselves in previous works, allows to obtain MSI index versus time and/or track progressive distance. The model is validated through comparison with experimental data available in literature and with measures recorded and obtained on regular trains during tests performed in Slovenia (EU).

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