Final State- After the household abandons their landline telephones t=0 C= These states are disjoint, but we do not assume that all states must be reached during the time. line of a household. We do assume that cell phones, once acquired, are never lost; and we assume that landlines, once dropped, are never readopted. Thus, a household will never reenter a state that it has left. Thus. a household will reach one or more of the above states in the order listed Suppose a household with three members(m=3), one landline telephone (t= 1), and no cell phones yet(c=0). The graph below shows the complete timeline of a hypothetical household with each of the four phases labeled Landline Power Consumption =,-:= 6 °0gss9"s80oa2.4060811214-16-1820 Note that our model will generate household state transition probabilities from available demo- graphic data. However, this process is simulation dependent; and we discuss it later, in the con text of simulating the current United States Nations Households are only part of the story. We model the national timeline during the country-wide transition from landlines to cell phones as a composition of multiple overlapping household time lines. Furthermore, the decisions that households make regarding when to acquire cell phones and when to abandon their landlines are dependent on the larger national context. For example, a household would be much more likely to acquire its second or third cell phone in 2008 than it would have been in 1990 A hypothetical nation with only three households might have the following timeline composi- tion. The UMAP Journal 30(3)(2009). @Copyright 2009 by COMAP, Inc. All rights reserved• Final State - After the household abandons their landline telephones. • t = 0 • c = m These states are disjoint, but we do not assume that all states must be reached during the time￾line of a household. We do assume that cell phones, once acquired, are never lost; and we assume that landlines, once dropped, are never readopted. Thus, a household will never reenter a state that it has left. Thus, a household will reach one or more of the above states in the order listed. Suppose a household with three members (m = 3), one landline telephone (t = 1), and no cell phones yet (c = 0). The graph below shows the complete timeline of a hypothetical household with each of the four phases labeled. 0 2 4 6 8 10 12 14 16 18 90 92 94 96 98 00 02 04 06 08 10 12 14 16 18 20 Power Consumption (watts) Total Power Landline Power Consumption Cell Phone Power Consumption Figure 1. Note that our model will generate household state transition probabilities from available demo￾graphic data. However, this process is simulation dependent; and we discuss it later, in the con￾text of simulating the current United States. Nations Households are only part of the story. We model the national timeline during the country-wide transition from landlines to cell phones as a composition of multiple overlapping household time￾lines. Furthermore, the decisions that households make regarding when to acquire cell phones and when to abandon their landlines are dependent on the larger national context. For example, a household would be much more likely to acquire its second or third cell phone in 2008 than it would have been in 1990. A hypothetical nation with only three households might have the following timeline composi￾tion: The UMAP Journal 30 (3) (2009). ©Copyright 2009 by COMAP, Inc. All rights reserved