Comparing these 28,454 true matches with those obtained by our matching heuristic, we distinguish three cases: (1) 20,579 are linked correctly, (2) 124 are linked incorrectly (0.6% error rate), and (3) 7,751 are not linked (27.7% miss rate).
our heuristic achieves a very high precision of 0.994 at a reasonably high recall of 0.723.