Goto

Collaborating Authors

 tvar


Dynamic covariate balancing: estimating treatment effects over time

arXiv.org Machine Learning

This paper discusses the problem of estimation and inference on time-varying treatments. We propose a method for inference on treatment histories, by introducing a \textit{dynamic} covariate balancing method. Our approach allows for (i) treatments to propagate arbitrarily over time; (ii) non-stationarity and heterogeneity of treatment effects; (iii) high-dimensional covariates, and (iv) unknown propensity score functions. We study the asymptotic properties of the estimator, and we showcase the parametric convergence rate of the proposed procedure. We illustrate in simulations and an empirical application the advantage of the method over state-of-the-art competitors.


Using Open Source Data & Machine Learning to Predict Ocean Temperatures

#artificialintelligence

In this tutorial, we're going to show you how to take open source data from the National Oceanic and Atmospheric Administration (NOAA), clean it, and forecast future temperatures using no-code machine learning methods. This particular data comes from the Harmful Algal BloomS Observation System (HABSOS). There are several interesting questions to ask of this data -- namely, what is the relationship between algal blooms and water temperature fluctuations. For this tutorial, we're going to start with a basic question: can we predict what temperatures will be over the next five months? There are a lot of approaches to this; what is shown below is just one approach.


On orthogonal projections for dimension reduction and applications in variational loss functions for learning problems

arXiv.org Machine Learning

The use of orthogonal projections on high-dimensional input and target data in learning frameworks is studied. First, we investigate the relations between two standard objectives in dimension reduction, maximizing variance and preservation of pairwise relative distances. The derivation of their asymptotic correlation and numerical experiments tell that a projection usually cannot satisfy both objectives. In a standard classification problem we determine projections on the input data that balance them and compare subsequent results. Next, we extend our application of orthogonal projections to deep learning frameworks. We introduce new variational loss functions that enable integration of additional information via transformations and projections of the target data. In two supervised learning problems, clinical image segmentation and music information classification, the application of the proposed loss functions increase the accuracy.