Search results for "selection"
showing 10 items of 1940 documents
Multiproduct trading with a common agent under complete information: Existence and characterization of Nash equilibrium
2014
This paper focuses on oligopolistic markets in which indivisible goods are sold by multiproduct firms to a continuum of homogeneous buyers, with measure normalized to one, who have preferences over bundles of products. Our analysis contributes to the literature on private, delegated agency games with complete information, extending the insights by Chiesa and Denicolò (2009) to multiproduct markets with indivisibilities and where the agent's preferences need not be monotone. By analyzing a kind of extended contract schedules -mixed bundling prices- that discriminate on exclusivity, the paper shows that efficient equilibria always exist in such settings. There may also exist inefficient equil…
Social Economy Managers: Between Values and Entrenchment
2004
Managers play a key role in Social Economy corporate governance and can determine the path that these companies will take. This article analyses the theoretical aspects underlying the central role of managers in Social Economy enterprises, the nature of these strategic human resources, particularly the variables that influence their behaviour, and their ability to shape paths or strategies that strengthen or undermine the Social Economy identity of these enterprises. Finally, taking a prescriptive approach, it examines the advantages and limitations of different options for management selection and control.
Is traditional teaching really all that bad? A within-student between-subject approach
2011
Abstract Recent studies conclude that teachers are important for student learning but it remains uncertain what actually determines effective teaching. This study directly peers into the black box of educational production by investigating the relationship between lecture style teaching and student achievement. Based on matched student–teacher data for the US, the estimation strategy exploits between-subject variation to control for unobserved student traits. Results indicate that traditional lecture style teaching is associated with significantly higher student achievement. No support for detrimental effects of lecture style teaching can be found even when evaluating possible selection bia…
DETECTING VOLCANIC ERUPTIONS IN TEMPERATURE RECONSTRUCTIONS BY DESIGNED BREAK-INDICATOR SATURATION
2016
We present a methodology for detecting breaks at any point in time-series regression models using an indicator saturation approach, applied here to modelling climate change. Building on recent developments in econometric model selection for more variables than observations, we saturate a regression model with a full set of designed break functions. By selecting over these break functions using an extended general-to-specific algorithm, we obtain unbiased estimates of the break date and magnitude. Monte Carlo simulations confirm the approximate properties of the approach. We assess the methodology by detecting volcanic eruptions in a time series of Northern Hemisphere mean temperature spanni…
The role of «perceived loss» aversion on credit screening: an experiment
2013
A major characteristic of credit markets is information asymmetry.To combat its problems, as credit rationing, principals can use a menu of contracts to screen clients with different risk level. We conduct a laboratory experiment to address an important question for such settings —does the framing of the offered menu of contracts interfere with the self-selection mechanism? The answer is yes. We find subjects' choices shift when the same (positive) outcomes of the same menu of contracts are presented in two different frames. Subjects exhibit loss aversion in their perception of the positive outcomes below the reference point, and self-selection fails to occur. Uno de los mayores problemas a…
Institutional Logics in Police Performance Indicator Development : A Comparative Case Study of Spain and Finland
2015
Police performance is not easily measurable and the organization and circumstances of police work vary among European countries. Further, police work is surrounded by multiple pressures to make it both economical and effective. Consequently, there are multiple institutional logics in decision-making which may affect the selection and the use of police key performance indicators (KPIs). The KPI selection and use processes reflect the institutional logics, though KPI use may also sometimes influence the institutional logics of police work. In this study, we analyze the KPIs and institutional logics in police work in Finland and Spain. A comparative case research approach is used in order to h…
Is the PGM1 locus subject to selection?
1973
The placental phosphoglucomutase phenotypes controlled by the first locus of 235 German and 119 non-German samples were determined. Both in the pooled material and in the sample containing German subjects only there was a significant deviation from the expected Hardy-Weinberg equilibrium. A segregation analysis of 1174 families also revealed significant deviations in the phenotypes of the children, though the mating frequencies were as expected. The distribution of the children's phenotypes deviated significantly from Hardy-Weinberg equilibrium though this was not found in the parent samples. The results are discussed.
Preference, Rationality and Interindividual Variation: The Persisting Debate About Female Choice
2015
Contemporary research on sexual selection remains deeply influenced by the controversy between Charles Darwin and Alfred Russel Wallace about the true nature and importance of female choice. After briefly reviewing the main points of disagreement between the two famous evolutionists, I discuss some methodological issues relevant to the contemporary study of female choice. I first use some recent controversy about sexual selection in the Indian Peafowl, Pavo cristatus, to illustrate several recurring problems and shortcomings in the empirical study of female preference for male characters. I then address the empirical evidence for rationality in female choice, and discuss how the recently em…
Examining five pathways on how self-control is associated with emotion regulation and affective well-being in daily life.
2020
OBJECTIVE Self-control is positively connected to well-being, but less is known about what, on the mechanistic level, explains this association. We hypothesized five pathways how this connection could be explained by emotion regulation, that is, by facilitating (a) strategy effectiveness, (b), adaptive strategy selection, (c) situation selection, (d) strategy variability, or (e) social sharing. METHOD To explore these pathways, we integrated two ambulatory assessment data sets (N = 250 participants, N = 22,796 observations) that included assessments of participants' emotions and their emotion regulation efforts. RESULTS We found that self-control was positively associated with affective wel…
Why Must Everything Be So Complicated? Demands and Challenges on Methods for Analyzing School Improvement Processes
2021
AbstractIn the recent years, awareness has risen by an increasing number of researchers that we need studies that appropriately model the complexity of school improvement if we want to increase our knowledge about school improvement substantially and to close the identified research gaps within this field (Feldhoff T, Radisch F, Klieme E, J Educ Admin 52(5):565–736, 2014; Hallinger P, Heck RH, School Effect School Improv 22(2):149–173, 2011; Sammons P, Davis S, Day C, Gu Q, J Educ Admin 52(5):565–589, 2014). So far, respective quantitative studies, that appropriately consider those complexities, have hardly been realized because of the high efforts of current methods and costs involved (Fel…