Research proposals may be solicited , meaning that they are submitted in response to a request with specified requirements, such as an request for proposal , or they may be unsolicited , meaning they are submitted without prior request. Other types of proposals include "preproposals", where a letter of intent or brief abstract is submitted for review prior to submission of a full proposal; continuation proposals, which re-iterate an original proposal and its funding requirements in order to ensure continued funding; and renewal proposals, which seek continued sponsorship of a project which would otherwise be terminated. 
Boomers were more intensely parented than generations before them. The widely popular advice of pediatrician Dr. Benjamin Spock during the 1950s and 60s influenced many parents to praise their children more, listen to them carefully, and restrain themselves in their use of corporal Boomers were also born into one of the most optimistic periods in US history. After WWII the economy grew rapidly, technology and medicine brought vastly improved lifestyles, progress in science, including space travel, created an aura in which anything seemed possible.
A final note before moving to the results themselves: While the PSID is a well-regarded data source used by many of the nation’s top social scientists, questions have been raised about the quality of the data in the 1990s, when the survey procedures changed. For most of the PSID’s history, the income reports in the PSID closely match those in other respected datasets, including the Census Bureau’s March Current Population Survey (CPS). Nonetheless, the PSID departs from the Current Population Survey at the bottom of the income distribution for roughly five years in the mid-1990s. 17 During this time, the lowest income categories in the PSID have lower average incomes than seen in other income datasets and the overall variance of the PSID income data jumps.