Inference under constrained distribution shifts

Large-scale administrative or observational datasets are increasingly used to inform decision making. While this effort aims to ground policy in real-world evidence, challenges have arise as that selection bias and other forms of distribution shift often plague observational data. Previous attempts to provide robust inferences have given guarantees depending on a user-specified amount of possible distribution shift (e.g., the maximum KL divergence between the observed and target distributions). However, decision makers will often have additional knowledge about the target distribution which constrains the kind of shifts which are possible. To leverage such information, we proposed a framework that enables statistical inference in the presence of distribution shifts which obey user-specified constraints in the form of functions whose expectation is known under the target distribution. The output is high-probability bounds on the value an estimand takes on the target distribution. Hence, our method leverages domain knowledge in order to partially identify a wide class of estimands. We analyze the computational and statistical properties of methods to estimate these bounds, and show that our method can produce informative bounds on a variety of simulated and semisynthetic tasks

Chiral Symmetry restoration from the hadronic regime

We discuss recent advances on QCD chiral symmetry restoration at finite temperature, within the theoretical framework of Effective Theories. $U(3)$ Ward Identities are derived between pseudoscalar susceptibilities and quark condensates, allowing to explain the behaviour of lattice meson screening masses. Unitarized interactions and the generated $f_0(500)$ thermal state are showed to play an essential role in the description of the transition through the scalar susceptibilityComment: 10 pages, 9 figures. Proceedings of "XII Quark Confinement and the Hadron Spectrum

Auditing Fairness by Betting

We provide practical, efficient, and nonparametric methods for auditing the fairness of deployed classification and regression models. Whereas previous work relies on a fixed-sample size, our methods are sequential and allow for the continuous monitoring of incoming data, making them highly amenable to tracking the fairness of real-world systems. We also allow the data to be collected by a probabilistic policy as opposed to sampled uniformly from the population. This enables auditing to be conducted on data gathered for another purpose. Moreover, this policy may change over time and different policies may be used on different subpopulations. Finally, our methods can handle distribution shift resulting from either changes to the model or changes in the underlying population. Our approach is based on recent progress in anytime-valid inference and game-theoretic statistics-the "testing by betting" framework in particular. These connections ensure that our methods are interpretable, fast, and easy to implement. We demonstrate the efficacy of our methods on several benchmark fairness datasets.Comment: 24 pages, 4 figure

Mexican Organizations: Alignment, ICTs and Leadership

Regardless of their classification and size, organizations face challenges that require the use of Information and Communication Technologies (ICTs) in order to overcome them. Once organizations identify and create their strategy, organization’s strategy alignment with ICTs becomes a necessity. Organizations’ management has different leadership styles that impact their outcomes; in addition, could influence such alignment. Mexican organizations, like their counterparts in other countries, implement controls for their operations. These controls demand strong support of tools that involve ICTs. Consequently, a strong differentiator is the adoption of ICTs that support their substantive work, regardless of its size. What does impact these organizations is the destination given to the investment in ICTs to support their processes. Past research in the strategic alignment of ICTs has made significant progress since the emergence of the Strategic Alignment Model (Henderson and Venkatraman 1993). Talon et al. (2016) proposed an approach, in which the alignment between the ICTs and the organizations’ objectives is given at the process level: lack of ICT support for critical activities in a specific process (ICT Deficit), ICTs fully support the key processes/macroprocesses (Alignment of ICTs), and finally surplus ICT resources (ICT surplus). The latter approach is what the present study uses for alignment measurement Goleman (2000) proposes six styles of leadership, coercive, authoritative, affiliative, democratic, pacesetting and coaching. He argues that, taken individually, they seem to have a unique and direct impact on the work climate of a company, division or team and, in turn, on financial performance. Furthermore, he believes that leaders who used styles that positively affected the climate had markedly better financial outcomes than those who did not. The main argument underlying the studies discussed previously is that organizations will function well when the key ICT resources, infrastructure, associated technical/administrative skills, and knowledge assets are aligned with the organizations’ strategy. The main objective of the present research is to identify whether such alignment is oriented to the macroprocesses/key processes of the organization. Those that are key to the type of strategy defined by the organization, and measure its deficit, alignment or surplus, whether they are applicable. In addition, intends to identify whether the leadership style in the organization influences the degree of alignment and execution of such strategy

Historia del diseño en América Latina y el Caribe. Industrialización y comunicación visual para la autonomía

Desde que perspectiva aproximarse al diseño y su historia, Es la interrogante clave de Gui Bonsiepe en el prefacio del libro Historia del diseño en América latina y el Caribe. Industrialización y comunicación visual para la antonomía, que �l coordina junto con Silvia Fernandez

A brief history of the interactions between climate and Mexican hydraulic design

Weather in Mexico is always extreme, for instance, in some portions of the desert of México the temperature can reach 134º F in the shade. On the other side in the Sierra Tarahumara, which is in the Mexican state of Chihuahua, high altitude produce in this place a cool oceanic climate (Köppen climate classification Cwb), characterized by mild days (38º F) and cold nights (-9.4º F).Traditionally the equipment and hydraulic infrastructure in this kind of extreme zones has been building for engineers, architects and industrial designers. A brief history is given of the development of hydraulic design, infrastructure works and technical design guidelines from antiquity to XX Century

TEK (TEK tyrosine kinase, endothelial)

Review on TEK (TEK tyrosine kinase, endothelial), with data on DNA, on the protein encoded, and where the gene is implicated