# Dynamical System for Economic Growth

Dynamical system — A means of describing how one state develops into another state over the course of time.

### Barack Obama

Phillips curve from 2008 through 2011 (top) and related misery index from January 2009 through March 2012 (bottom) with linear regression:

$\mathrm{Misery} = 0.10 \times \mathrm{Month} + 8.73$

More misery under Obama helps explain why Americans say the economy is in recession.

### Ronald Reagan

Not only did misery decrease during the same amount of time under Reagan. The rate of decrease was twice the rate of Obama’s increase — despite worse initial conditions at the beginning of Reagan’s term:

$\mathrm{Misery} = -0.20 \times \mathrm{Month} + 19.27$

Unemployment also fell another 2.1% in 1984, the last year of Reagan’s first term.