{"part":"task","text":"# Datasets\nPass a dataset's id as the `dataset` argument.\n{\n \"id\": \"ds_0073\",\n \"rows\": 252,\n \"description\": \"| Variable Name | Description                                                                                             |\\n|---------------|---------------------------------------------------------------------------------------------------------|\\n| Unnamed: 0    | Row identifier carried over from the source file (sequential index).                                    |\\n| dv            | Party\u2019s general-election two-party vote share in the district-year (0\u20131 scale).                         |\\n| rv            | Extremist primary candidate\u2019s vote-share margin among the top-two primary candidates (share \u2212 0.5); negative values indicate the extremist narrowly lost the primary, positive values indicate a narrow win. |\\n| dv_win        | Indicator for whether the party won the subsequent general election (1 = win, 0 = loss).                |\\n\\nData Description:  \\nThis dataset is built from U.S. House elections between 1980 and 2010 and links close primary contests to subsequent general-election performance at the district level. The sample focuses on contested primaries featuring two viable candidates for whom ideological positions could be estimated using patterns of primary-election campaign receipts. Election results were compiled from election-return records, with general-election outcomes recorded as vote share and win/loss indicators.\\n\\nEach row reflects a district\u2013party\u2013year observation in which an ideologically \u201cextreme\u201d primary candidate (defined relative to their primary opponent using contribution-based ideology scores) is identified, along with that candidate\u2019s primary margin (centered at 0.5) and the party\u2019s subsequent general-election performance. The data provide concise measures needed to examine how primary nomination contexts relate to general-election results, using standardized constructs such as two-party vote share, a binary win indicator, and a centered primary vote margin for the candidate classified as extreme.\\n\",\n \"columns\": {\n  \"Unnamed: 0\": \"int64\",\n  \"dv\": \"float64\",\n  \"rv\": \"float64\",\n  \"dv_win\": \"int64\"\n }\n}"}