Below is the three-year bond real interest rate from 2000-2012. Explain why the real interest rate is positive for most of the 2000s and what explains it being negative in 2008-2009 and 2011-2012.
Figure 8.2: Three-Year Bond Real Interest Rate: 2000-2012 
(Source: Federal Reserve Economic Data, St. Louis Federal Reserve)
Definitions:
Family Systems Framework
The Family Systems Framework is a theoretical model that views the family as an interconnected and interdependent system, where changes in one part of the system affect the entire family structure and dynamics.
Entropy
a concept in physics related to the degree of disorder or randomness in a system; often used metaphorically to describe chaos in information or organizational systems.
Family Adaptive Capacity
The ability of a family system to adjust, cope with, and adapt to changes, stressors, or challenges effectively.
Social Environment
The surrounding framework made up of the cultural, economic, demographic, and technological factors that affect individuals and communities.
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