Table 14.1.3.  Sales data

	Bimonthly	Firm A		     Seasonal
Year	 period	      unit sales      Time   indicator

1978	Jan/Feb		1.560		 1	-1
	Mar/Apr		1.821		 2	-1	
	May/Jun		1.901		 3	 1
	Jul/Aug		2.106		 4	 1
	Sep/Oct		1.965		 5	 1
	Nov/Dec		1.875		 6	-1
1979	Jan/Feb		2.005		 7	-1
	Mar/Apr		2.057		 8	-1
	May/Jun		2.139		 9	 1
	Jul/Aug		2.485		10	 1
	Sep/Oct		2.603		11	 1
	Nov/Dec		2.144		12	-1
1980	Jan/Feb		2.048		13	-1
	Mar/Apr		2.145		14	-1
	May/Jun		2.237		15	 1
	Jul/Aug		2.440		16	 1
	Sep/Oct		2.311		17	 1
	Nov/Dec		2.284		18	-1
1981	Jan/Feb		2.150		19	-1
	Mar/Apr		2.400		20	-1
	May/Jun		2.947		21	 1
	Jul/Aug		3.326		22	 1
	Sep/Oct		2.789		23	 1
	Nov/Dec		2.557		24	-1