One of the most difficult challenges in payment card fraud detection is extreme class imbalance. Fraudulent transactions ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Thomas J. Brock is a CFA and CPA with more ...

Will Kenton is an expert on the economy and investing laws and regulations. He previously held senior editorial roles at Investopedia and Kapitall Wire and holds a MA in Economics from The New School ...

Background Annually, 4% of the global population undergoes non-cardiac surgery, with 30% of those patients having at least ...

The number of Venezuelans in the U.S. has more than doubled in five years, to about 1.2 million. That makes Venezuelans the fastest-growing Hispanic group in percentage terms, far ahead of Ecuadorians ...

An inherent principle of publication is that others should be able to replicate and build upon the authors' published claims. A condition of publication in a Nature Portfolio journal is that authors ...