The editors of Challenges would like to express their sincere gratitude to the following reviewers for assessing manuscripts in 2016.
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The following reviewed for Challenges in 2016:
| Aldrian, Alexia | Gibson, Michelle | Meyer, David E. |
| Babbitt, Callie W. | Globus, Tatiana | Milgrom, Lionel R. |
| Baker, Michael | Guarcello, Rosa | Misra, Anupam K. |
| Bar, Ilana | Gulis, Gabriel | Morgan, Cristine |
| Barzilov, Alexander | Hakonen, Aron | Noffke, Nora |
| Bisschop, Lieselot | Hall, Jeffrey A. | Pantazopoulos, G. |
| Cao, Guofeng | Hendon, Christopher H. | Papadimitriuou, Konstantinos |
| Capka, Lukas | Hmielowski, Jay | Polak, John |
| Cavalazzi, Barbara | Hotta, Yasuhiko | Rietbergen, Martijn G. |
| Cebollada, Jose Javier | Jonason, Peter K. | Rodov, Victor |
| Chatzitheodoridis, Elias | Kim, Won H | Rollini, Manuela |
| Daim, Tugrul | Koeberg, Mattijs | Rosić, Bojana |
| De Souza Pereira, Wagner | Korf, Richard | Rusciano, Giulia |
| Dill-Shackleford, Karen | Koster, Auriane Magdalena | Silva, Celia C. G. |
| Fanelli, Daniele | Kuang, Yaoqiu | Skwarzec, Bogdan |
| Figueiredo, Luisa Pereira | Kyriakarakos, George | Soliman, Mohamed |
| Fitzpatrick, Colin | Levy, Jason | Szekely, Gyorgy |
| Francocci, Fedra | Lidon, Fernando Cebola | Tsuzuki, Marcos |
| Fraser, Tandra | Lilley, Debra | Wang, Fang |
| Gauthier, Pierre-Jean | Lima, Pedro U. | Yi, Hongtao |
| Gianfranco, Brunetti | Marx, Michael |
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