code: def test_concat_empty_dataframe_different_dtypes(
      self, using_infer_string
  ):
      # 39037
      df1 = DataFrame({"a": [1, 2, 3], "b": ["a", "b", "c"]})
      df2 = DataFrame({"a": [1, 2, 3]})
  
      result = concat([df1[:0], df2[:0]])
      assert result["a"].dtype == np.int64
      assert (
          result["b"].dtype == np.object_
          if not using_infer_string
          else "string"
      )
  
imports: import numpy
  import pytest
  import pandas
  from pandas import DataFrame, RangeIndex, Series, concat, date_range
  import pandas._testing
label_desc: Use image node_id 15 for calling the TestEmptyConcat obj's underlying member method code with example usage: obj.test_concat_empty_dataframe_different_dtypes(using_infer_string) without return types