1) CBC Television show 
''Catch-up' refers to the long-run process by which productivity laggards close the proportional gaps that separate them from the productivity leader .... 'Convergence,' in our usage, refers to a reduction of a measure of dispersion in the relative productivity levels of the array of countries under examination.' Like Barro and Sala-i-Martin (92)'s...
[v] - reach the point where one should be after a delay 2. [v] - learn belatedly
verb learn belatedly; find out about something after it happened; `I`m trying to catch up with the latest developments in molecular biology`
A common freestyle drill, in which one hand always remains in front of the head, just under the surface of the water. The left hand does not begin its stroke until the right hand taps it, and vice versa.