World2¶

State¶

class whynot.simulators.world2.State[source]¶

World2 state. Defaults correspond to the initial state in the standard run of World2.

capital_investment = 400000000.0¶: Total capital investment stock

capital_investment_in_agriculture = 0.2¶: Fraction of capital investment in agriculture

initial_natural_resources = 900000000000.0¶: Initial natural resources

natural_resources = 900000000000.0¶: Stock of natural resources

pollution = 200000000.0¶: Pollution stock

population = 1650000000.0¶: Total population stock

Config¶

class whynot.simulators.world2.Config[source]¶

Dynamics and simulation parameters for World2.

Default values correspond to the standard run of World2.

Examples

>>> # Set the initial birth rate to 0.05
>>> world2.config(birth_rate=0.05)

atol = 1e-06¶: solver absolute tolerance

birth_rate = 0.04¶

capital_investment_agriculture = 0.3¶

capital_investment_discard = 0.025¶

capital_investment_generation = 0.05¶

capital_investment_in_agriculture_frac_adj_time = 15.0¶

death_rate = 0.028¶

delta_t = 0.2¶: Time (in years) elapsed on each update of the discrete dynamics.

effective_capital_investment_ratio = 1.0¶

end_time = 2100¶: Time to end the simulation (in years).

food_coefficient = 1.0¶

food_normal = 1.0¶

intervention_time = 1970¶

land_area = 135000000.0¶

natural_resources_usage = 1.0¶

pollution = 1.0¶

pollution_standard = 3600000000.0¶

population_density = 26.5¶

quality_of_life_standard = 1.0¶

rtol = 1e-06¶: solver relative tolerance

start_time = 1900¶: Time to initialize the simulation (in years).

Interventions¶

class whynot.simulators.world2.Intervention[source]¶

Class to specify interventions in World2 dynamics.

An intervention is a subset of the configuration variables, and only variables passed into the constructor are modified.

Examples

>>> # Set the death rate to 0.06 in 1980. All other parameters unchanged.
>>> world2.Intervention(time=1980, death_rate=0.06)

Experiments¶

Experiments for world2 simulator.

whynot.simulators.world2.experiments.RCT = world2_rct¶: RCT experiment for world2.

whynot.simulators.world2.experiments.BiasedTreatment = world2_biased_treatment¶: Observational experiment with confounding for world2.

whynot.simulators.world2.experiments.Mediation = world2_mediation¶: Observational experiment with mediation for world2.