Charitable contributions are frequently made over time. Donors are free to contribute whenever they wish and as often as they want, and are frequently updated on the level of contributions by others. A dynamic structure enables donors to condition their contribution on that of others, and, as Schelling (1960) suggested, it may establish trust thereby increasing charitable giving. Marx and Matth...

Many real-world machine learning tasks are faced with the problem of small training sets. Additionally, the class distribution of the training set often does not match the target distribution. In this paper we compare the performance of many learning models on a substantial benchmark of binary text classification tasks having small training sets. We vary the training size and class distribution...

In this paper we take an important step towards completely unsupervised stemming by giving a scheme for semi supervised stemming. The input to the system is a list of word forms and suffixes. The motivation of the work comes from the need to create a root or stem identifier for a language that has electronic corpora and some elementary linguistic work in the form of, say, suffix list. The scope...