I recently received a review copy of Jean Chatzky’s The Difference: How Anyone Can Prosper in Even The Toughest Times, where she attempts to understand why some people easily move from barely getting by into a life of comfort and/or wealth, while others get stuck or even fall backwards. What are the attributes that set them apart?

From her research, she divided people into four groups: The wealthy, which have on average assets of $2 million, not including home equity. The financially comfortable, who save regularly and have a financial cushion. The paycheck-to-paycheck, who are getting by but are one unexpected expense away from stumbling into the last group, which are the further-in-debtors. Here’s how the population breaks down: