We review the evidence on the practice and effects of discretionary fiscal policy, particularly in the context of recent efforts to stimulate the economy, reaching two main conclusions. First, policy interventions have increased in this decade, pre-dating the 2009 stimulus. Second, despite a large economic literature on the topic, the state of theory and evidence is not as "shovel ready" as one...

Acquiring labels for large datasets can be a costly and timeconsuming process. This has motivated the development of the semisupervised learning problem domain, which makes use of unlabelled data — in conjunction with a small amount of labelled data — to infer the correct labels of a partially labelled dataset. Active Learning is one of the most successful approaches to semi-supervised learning...

Natural rate misperceptions generated the potential of significant upward inflationary pressure in the late 1960s and 1970s. With the activist stabilization policy in place during this period, these misperceptions led to a series of persistent policy errors that inadvertently destabilized the economy and inflation expectations. We develop a model that highlights the interaction of these policy ...