Facts:   - repec id: pge194    - institution: university of california , berkeley    - field: development economics health economics      - birth date: 30 march 1955    - name: paul gertler    - color: lightsteelblue    - nationality: united states    - repec prefix: e    - alma mater: university of wisconsin   Based on these bullet points, write a short biography describing the life of paul gertler .
A:
paul gertler -lrb- born march 30 , 1955 -rrb- is an american economist and the li ka shing distinguished professor of economics in the haas school of business and the school of public health at uc berkeley .gertler is considered an early pioneer in the randomized evaluation of social programs in developing countries .he co-led the impact evaluation of the mexican government welfare program oportunidades , as well as the rwandan government 's roll-out of results-based financing for health .as chief economist for the world bank human development network -lrb- 2004-2006 -rrb- , he helped to establish a culture of rigorous impact evaluation .currently , gertler serves as the chairman of the board of commissioners for 3ie , the international initaitive for impact evaluation .he is also a co-founder and affiliate of the center for effective global action at the university of california .