{
  "paper": {
    "rank": 6,
    "paper_id": "aeraej-110",
    "title": "Moderating Political Extremism: Single Round versus Runoff Elections under Plurality Rule",
    "authors": "Massimo Bordignon; Tommaso Nannicini; Guido Tabellini",
    "year": 2016,
    "journal": "American Economic Review",
    "doi": "10.1257/aer.20131024",
    "package_bytes": 206182,
    "source_specification": "Table 3"
  },
  "mapping": {
    "paper_id": "aeraej-110",
    "match": true,
    "outcome": "number_parties",
    "treatment": "t15000",
    "unit": "id_city_istat",
    "time": "year_election",
    "cluster": "id_city_istat",
    "assessment_status": "unsupported_sample",
    "assessment_reason": "No treated unit has an observation in the calendar year immediately before adoption. The irregular municipal-election panel has no minus-one baseline on the requested annual clock; election years are not silently compressed into common annual waves."
  },
  "status": "unsupported_sample",
  "source_fit": {
    "formula": "list(linear = number_parties ~ t15000, fixef = ~id_city_istat +      year_election)",
    "coefficients": {
      "t15000": 2.30333451576663
    },
    "se": [
      0.657810678562934
    ],
    "n": 2027
  },
  "source_check": {
    "source_term": "t15000",
    "source_beta": 2.30333451576663,
    "template_source_sample_beta": 2.3033345156637366,
    "template_source_sample_n": 2027,
    "template_source_sample_se": 0.5395745050653254,
    "same_point_specification": true,
    "dropped_missing_identifiers": 0,
    "controls": {},
    "absolute_coefficient_difference": 1.0289324947621026e-10
  },
  "reason": "No treated unit has an observation in the calendar year immediately before adoption. The irregular municipal-election panel has no minus-one baseline on the requested annual clock; election years are not silently compressed into common annual waves."
}