Jon Green

How to overcome the habits that are stealing joy from your lifeOur upside-down culture celebrates vice and undervalues virtue, leading us to feed the wrong habits while we allow life-giving practices to die. It's no wonder we feel empty, exhausted, and directionless. There's a better, more fulfilling way to live, and it doesn't involve looking inside yourself for the answers--because that's not where you'll find them. With his signature wit and wisdom, Jonathan "JP" Pokluda helps you? unpack the age-old virtues we're told to pursue in Scripture? understand how these God-given goals free us to love and live as we wish we would? redefine what's important to you and reclaim a life of virtuePracticing virtues is not just something you do--it's something done in you, slowly but surely transforming you into the person you were meant to be all along.

Causal inference and machine learning are typically introduced in the social sciences separately as theoretically distinct methodological traditions. However, applications of machine learning in causal inference are increasingly prevalent. This Element provides theoretical and practical introductions to machine learning for social scientists interested in applying such methods to experimental data. We show how machine learning can be useful for conducting robust causal inference and provide a theoretical foundation researchers can use to understand and apply new methods in this rapidly developing field. We then demonstrate two specific methods – the prediction rule ensemble and the causal random forest – for characterizing treatment effect heterogeneity in survey experiments and testing the extent to which such heterogeneity is robust to out-of-sample prediction. We conclude by discussing limitations and tradeoffs of such methods, while directing readers to additional related methods available on the Comprehensive R Archive Network (CRAN).

The definitive guide to the birdwatching sites of Wales. Wales remains one of the most alluring regions for birdwatchers; its range of habitats ensures a wide variety of species amidst the often spectacular scenery. Now in its fifth edition, Where to Watch Birds in Wales remains an invaluable and most trusted site guide for birdwatching in Wales. This new edition features many new sites, and includes updated maps to the sites and fully revised and expanded text. This is an essential guide for all birdwatchers living in or visiting this land of hills, valleys, moors and mountains.