Table 2 Payoff matrix under cooperation or non-cooperation.

From: Analysis of long-term strategies of riparian countries in transboundary river basins

Country 1

Country 2

Country 3

Cooperation (\({x}_{1}^{(3)}\))

Non-cooperation (\({x}_{2}^{(3)}\))

Cooperation (\({x}_{1}^{(1)})\)

Cooperation (\({x}_{1}^{(2)}\))

(\({U}_{111}^{\left(1\right)},{U}_{111}^{\left(2\right)},{U}_{111}^{\left(3\right)})\)

(\({U}_{112}^{(1)},{U}_{112}^{(2)},{U}_{112}^{(3)})\)

Non-cooperation (\({x}_{2}^{(2)}\))

(\({U}_{121}^{(1)},{U}_{121}^{(2)},{U}_{121}^{(3)})\)

(\({U}_{122}^{(1)},{U}_{122}^{(2)},{U}_{122}^{(3)})\)

Non-cooperation (\({x}_{2}^{(1)}\))

Cooperation (\({x}_{1}^{(2)})\)

(\({U}_{211}^{(1)},{U}_{211}^{(2)},{U}_{211}^{(3)})\)

(\({U}_{212}^{(1)},{U}_{212}^{(2)},{U}_{212}^{(3)})\)

Non-cooperation (\({x}_{2}^{(2)}\))

(\({U}_{221}^{\left(1\right)},{U}_{221}^{\left(2\right)},{U}_{221}^{\left(3\right)})\)

(\({U}_{222}^{(1)},{U}_{222}^{(2)},{U}_{222}^{(3)})\)

  1. \({x}_{1}^{(i)}\) and \({x}_{2}^{(i)}\), represents the probabilities of country \(i\) (= 1, 2, 3) acting cooperatively or non-cooperatively, respectively. Notice that \({x}_{1}^{(i)}+{x}_{2}^{(i)}\) = 1.