def load():
    """name of dataset: card
    no of variables: 34
    no of observations: 3010

    +----------+--------------------------------+
    | variable | label                          |
    +----------+--------------------------------+
    | id       | person identifier              |
    | nearc2   | =1 if near 2 yr college, 1966  |
    | nearc4   | =1 if near 4 yr college, 1966  |
    | educ     | years of schooling, 1976       |
    | age      | in years                       |
    | fatheduc | father's schooling             |
    | motheduc | mother's schooling             |
    | weight   | NLS sampling weight, 1976      |
    | momdad14 | =1 if live with mom, dad at 14 |
    | sinmom14 | =1 if with single mom at 14    |
    | step14   | =1 if with step parent at 14   |
    | reg661   | =1 for region 1, 1966          |
    | reg662   | =1 for region 2, 1966          |
    | reg663   | =1 for region 3, 1966          |
    | reg664   | =1 for region 4, 1966          |
    | reg665   | =1 for region 5, 1966          |
    | reg666   | =1 for region 6, 1966          |
    | reg667   | =1 for region 7, 1966          |
    | reg668   | =1 for region 8, 1966          |
    | reg669   | =1 for region 9, 1966          |
    | south66  | =1 if in south in 1966         |
    | black    | =1 if black                    |
    | smsa     | =1 in in SMSA, 1976            |
    | south    | =1 if in south, 1976           |
    | smsa66   | =1 if in SMSA, 1966            |
    | wage     | hourly wage in cents, 1976     |
    | enroll   | =1 if enrolled in school, 1976 |
    | KWW      | knowledge world of work score  |
    | IQ       | IQ score                       |
    | married  | =1 if married, 1976            |
    | libcrd14 | =1 if lib. card in home at 14  |
    | exper    | age - educ - 6                 |
    | lwage    | log(wage)                      |
    | expersq  | exper^2                        |
    +----------+--------------------------------+

    D. Card (1995), "Using Geographic Variation in College Proximity to
    Estimate the Return to Schooling," in Aspects of Labour Market
    Behavior: Essays in Honour of John Vanderkamp. Ed. L.N. Christophides,
    E.K. Grant, and R. Swidinsky, 201-222. Toronto: University of Toronto
    Press. Professor Card kindly provided these data."""

    import wooldridge
    return wooldridge.load(__file__, "card.csv.bz2")


def wooldridge():
    import wooldridge
    print(wooldridge.dataset_list)