For a person with asthma, an inhaler is a literal lifeline. But not everyone knows how to use them. Inhalers are often used for asthma, a condition in which the lungs struggle to get enough air ...

Purchasing power parities (PPPs) are primarily used to convert economies’ national accounts expenditures on GDP and its components into a common currency. PPPs control for differences in price levels ...

To help you effectively understand and manage the finances of your small business, we've tested the top accounting software based on customization, features, ease of use, value, and more. I’ve been ...

We test and rate the top video editing software for every type of user, from casual family event videographers to social media posters to studio professionals. I’ve been writing and editing technology ...

Most developmental psychologists agree that what differentiates leaders is not so much their philosophy of leadership, their personality, or their style of management. Rather, it’s their internal ...

Four clearly defined piles turn an overwhelming closet cleanout into a decision-making process anyone can get through in an afternoon. The spring closet cleanout is one of those tasks that feels ...

In 2013, the president of Rwanda asked us for evaluation results from across the continent that could provide lessons for his country’s policy decisions. One program tested in Kenya jumped out, and ...

Adam Hayes, Ph.D., CFA, is a financial writer with 15+ years Wall Street experience as a derivatives trader. Besides his extensive derivative trading expertise, Adam is an expert in economics and ...

This two-hour program is divided into 16 chapters. Choose any chapter below and select QuickTime or Real Video to begin viewing. If you experience difficulty viewing, it may be due to high demand. We ...

July 24, 2026 • Let’s head to a small town in Kenya that’s become globally famous for helping economists answer some of the biggest questions facing humanity.