We perform an almost identical process with historic landline ownership data in order to deter mine the probability of a household dropping their landline in month M. Because the process is the same, we omit it. Mnemonically, however: a(M) shall be the probability of acquiring a cell phone; d(M)shall be the probability of dropping a landline Simulating the Current U. s The historical demographic data will help guide our simulation, and the technological data will help us calculate the rate of energy consumption at any point during the simulation. With that d, we algorithmically generate household timelines like While month m is before end date F H∈ Houses if h is in’ initial’or' acquisition’ state get a new cell phone with probability a(M) f h is in transition, state get rid of landline with probability d(m) End For alculate power consumption using Wattage, Wattage, and current ph +1 month Here is the national timeline detailing the rate of energy consumption for the current United States over the past nineteen years 2000 Landline power Cell Phone Power Consumption 1400 Time Interesting features of this graph are The steep energy consumption as Americans acquire cell phones yet retain their landlines. The drop after cell phone penetration slows and landlines are abandoned The slope after households dropped their landlines and the population grows The UMAP Journal 30(3)(2009). @Copyright 2009 by COMAP, Inc. All rights reservedWe perform an almost identical process with historic landline ownership data in order to deter￾mine the probability of a household dropping their landline in month M. Because the process is the same, we omit it. Mnemonically, however: a(M) shall be the probability of acquiring a cell phone; d(M) shall be the probability of dropping a landline. Simulating the Current U.S. The historical demographic data will help guide our simulation, and the technological data will help us calculate the rate of energy consumption at any point during the simulation. With that said, we algorithmically generate household timelines like so: While month M is before end date For every house H ∈ Houses do if H is in ’initial’ or ’acquisition’ state get a new cell phone with probability a(M) if H is in ’transition’ state get rid of landline with probability d(M) End For Calculate power consumption using Cwattage, Lwattage, and current phone ownership. Let M = M + 1 month end while Here is the national timeline detailing the rate of energy consumption for the current United States over the past nineteen years. 0 200 400 600 800 1000 1200 1400 1600 1800 2000 ’90 ’00 ’10 ’20 ’30 ’40 ’49 ’59 Power Consumption (Megawatts) Time Total Power Landline Power Consumption Cell Phone Power Consumption Figure 5. Interesting features of this graph are: • The steep energy consumption as Americans acquire cell phones yet retain their landlines. • The drop after cell phone penetration slows and landlines are abandoned. • The rising slope after households have dropped their landlines and the population grows. The UMAP Journal 30 (3) (2009). ©Copyright 2009 by COMAP, Inc. All rights reserved