请问Fisher的The effect of information asymmetry on negotiated budgets:an empirical investigation这篇文章的数据分析用的是什么方法？

Table 1
Mean (Standard deviation) for negotiation process variables by information condition
Information condition
Symmetry Asymmetry t-statistic P-value
No. of dyads 29 23
FORECAST 78.90 78.09 0.31 < 0.76**
(6.38) (11.11)
BID 62.10 41.35 3.96 < 0.01*
(15.86) (21.94)
COUNTER 75.17 88.70 1.44 < 0.17**
(12.92) (43.59)
INITIAL DIFF 13.07 47.35 3.06 < 0.01*
(16.09) (51.78)
ABCONCEDE 5.59 18.61 2.77 < 0.01*
(8.90) (21.11)
RECONCEDE 40.80% 41.92% 0.92 < 0.19*
(0.46) (0.24)
No. of dyads agreeing 19 14
% Agreeing 65.5% 60.9% > 0.20**
Definition of variables FORECAST=subordinates’ performance estimate for the work session BID= subordinates’ initial budget
proposals COUNTER= superiors’ initial counteroffers INITIAL DIFF=difference between superiors’ and subordinates initial
negotiation positions (measured as COUNTER-BID) ABCONCEDE=number of units superiors conceded in the budget negotiation
(measured as COUNTER- BUDGET) RECONCEDE=superiors’ relative amount of concession in the negotiation (measured as
ABCONCEDE / INITIAL DIFF) * Directional prediction; one-tail P-value; ** Non-directional prediction; two-tail P-value