Table 1 Model parameters (first part) and related quantities (second part).
From: Direct reciprocity and model-predictive rationality explain network reciprocity over social ties
Parameter | Description | Reference values | Other values |
|---|---|---|---|
N | network size | 1000 | — |
r | PD return | \([1,6]\) | \([20,60]\) in Fig. S2e |
δ | rate of strategy update | 0.05 | 0.025, 0.1 in Fig. S3 (right) |
h | predictive horizon | 2, 3, 4, 5 | — |
d | direct reciprocity (\({d}_{{\rm{\min }}}=-\,(1/\delta -1)\); \({d}_{{\rm{\max }}}=1\)) | 0 (normal) | 1/2 (super), −1 (sub) in Fig. S3 (left) |
\({\delta }_{d}=(1-d)\delta \) | reciprocity-biased update rate | 0.05 | 0.025, 0.1 in Fig. S3 (left) |
\(\langle a\rangle \) | average length of abstention periods | 4.56 | 6.90, 2.91 in Fig. S3 |
