## Introduction
The SIMPLE-G models are open-source gridded economic models introduced in the SIMPLE-G Book. To run simulations, users will need GEMPACK software, along with the accompanying model codes, input data, parameters, and command files available at: https://www.gtap.agecon.purdue.edu/simple-g/

## Resources
SIMPLE Book: https://doi.org/10.1007/978-3-319-22662-0 
SIMPLE-G Book: https://doi.org/10.1007/978-3-031-68054-0
SIMPLE-G Webpage: https://www.gtap.agecon.purdue.edu/simple-g/
SIMPLE-G YouTube Videos: https://tinyurl.com/SIMPLE-G-Book 
SIMPLE-G Short Course: https://mygeohub.org/courses/sustainability_shortcourse_2024

## Visualization tools
Analyze SIMPLE-G Results in Jupyter Notebook and R: https://tinyurl.com/simpleg-handout 
SIMPLE-G Web Application: https://mygeohub.org/resources/simpleus 
SIMPLE-G Online: Computation: https://mygeohub.org/resources/simplegus  


## User guides:
SIMPLE-G-US: https://doi.org/10.13019/4WMW-R163
SIMPLE-G-Global-Climate: https://doi.org/10.13019/4788-WF85
SIMPLE-G-Global-Groundwater: https://doi.org/10.13019/N2JW-MJ82

## How to cite: 
Haqiqi, Iman and Thomas W. Hertel (eds.) SIMPLE-G: A Gridded Economic Approach to Analysis of Sustainability of the Earth’s Land and Water Resources, Springer International Publishing Switzerland, 2025. https://doi.org/10.1007/978-3-031-68054-0

## Application chapters (chapter 12 to chapter 17)
Fuglie, K., Ray, S., Baldos, U.L.C., Hertel, T.W. (2025). The R&D Cost of Climate Mitigation in Agriculture. In: Haqiqi, I., Hertel, T.W. (eds) SIMPLE-G. Springer, Cham. https://doi.org/10.1007/978-3-031-68054-0_10

Fraysse, E.A., Hertel, T.W., Ray, S. (2025). Gridded Implications of Total Factor Productivity Growth. In: Haqiqi, I., Hertel, T.W. (eds) SIMPLE-G. Springer, Cham. https://doi.org/10.1007/978-3-031-68054-0_11

Haqiqi, I., Bowling, L., Jame, S., Baldos, U.L.C., Liu, J., Hertel, T.W. (2025). Local Groundwater Sustainability Policies and Global Spillovers. In: Haqiqi, I., Hertel, T.W. (eds) SIMPLE-G. Springer, Cham. https://doi.org/10.1007/978-3-031-68054-0_12

Ray, S., Haqiqi, I., Hill, A.E., Taylor, J.E., Hertel, T.W. (2025). The Role of Labor Markets in Determining the Efficacy and Distributional Impact of Sustainability Policies. In: Haqiqi, I., Hertel, T.W. (eds) SIMPLE-G. Springer, Cham. https://doi.org/10.1007/978-3-031-68054-0_13

Liu, J. et al. (2025). Tackling Policy Leakage and Targeting Hot Spots Could Be Key to Addressing the “Wicked” Challenge of Nutrient Pollution from Corn Production in the United States. In: Haqiqi, I., Hertel, T.W. (eds) SIMPLE-G. Springer, Cham. https://doi.org/10.1007/978-3-031-68054-0_14

Wang, Z. (2025). The Role of Transportation Infrastructure Expansion in the Transmission of Global Crop Price Shocks to the Brazilian Agriculture. In: Haqiqi, I., Hertel, T.W. (eds) SIMPLE-G. Springer, Cham. https://doi.org/10.1007/978-3-031-68054-0_15

Haqiqi, I., Perry, C.J., Hertel, T.W. (2025). Global Groundwater Sustainability and Virtual Water Trade. In: Haqiqi, I., Hertel, T.W. (eds) SIMPLE-G. Springer, Cham. https://doi.org/10.1007/978-3-031-68054-0_16

Haqiqi, I. et al. (2025). Interplay Between the Pandemic and Environmental Stressors. In: Haqiqi, I., Hertel, T.W. (eds) SIMPLE-G. Springer, Cham. https://doi.org/10.1007/978-3-031-68054-0_17