Format blurring: how the advent of the Walmart Supercenter has changed the U.S. grocery industry

Figures & data

Figure 1. Comparison of store G’s profits between the specialisation and expansion strategies (c = 0.5, α = 0.5). A: ${\Pi }_G^{1\mathrm{*}}-{\Pi }_G^{2\mathrm{*}}>0,$ B: ${\Pi }_G^{1\mathrm{*}}-{\Pi }_G^{2\mathrm{*}}<0,$ C: Non-feasible areas, Dashed line: $DS=\left[c\left(1+\alpha \right)\right].$

Source: Authors.

Figure 2. Store G’s profits for different levels of service (c = 0.5, α = 0.5). Dashed line = ${\Pi }_G^{1*},$ Straight line = ${\Pi }_G^{2*}$

Source: Authors.

Table 1. Examination of [DS/d*] for different parameter values.

α		c
		0.1	0.5	0.99	1.5
0.01	Max	4.96	4.96	4.96	4.96
	Min	3.80	3.80	3.80	3.80
	Mean	4.01	3.96	3.95	3.95
0.5	Max	3.31	3.31	3.31	3.31
	Min	2.63	2.63	2.63	2.63
	Mean	2.98	2.94	2.93	2.93
0.99	Max	2.76	2.76	2.76	2.76
	Min	1.20	1.20	1.20	1.20
	Mean	2.18	2.19	2.20	2.20

Source: Authors.

Figure 3. Store G’s profits for different α values (c = 0.5, DS = 0.7).

Source: Authors.

Figure 4. Store G’s profits for different values of c and α. A: ${\Pi }_G^{1\mathrm{*}}-{\Pi }_G^{2\mathrm{*}}>0,$ B: ${\Pi }_G^{1\mathrm{*}}-{\Pi }_G^{2\mathrm{*}}<0,$ C: Non-feasible areas, Dashed line: $DS=\left[c\left(1+\alpha \right)\right].$

Source: Authors.