Quah's mobility matrices suggest that: countries do not often change their income relative to the world average; that this is most true of the richest and poorest countries; and that for, those that do experience a change, a downward shift is more common than an upward shift. In what ways do these observations lend support to: (a) the path dependency thesis presented in Chapter 3 of Cypher and Dietz; and (b) Sen's proposition that freedom/capabilities themselves are important means to the expansion of further freedoms/capabilities?