New release + NEWS.

Author: SebKrantz

NEWS.md

@@ -1,4 +1,13 @@
+# 0.1.8
+
+* Fixed dual solution with `cross_good_congestion = true`, and set the default `duality = true` in `init_parameters()`. It is highly recommended to keep `beta <= 1` in fixed labor cases to harness the dual solutions, which yield a tremendous speedup.
+
+# 0.1.7
+
+* If `duality = true`, in `init_parameters()` (and `labor_mobility = false` - no dual solutions available for mobile labor cases), a new direct dual implementation of the model is used (with hard-coded sparse hessians passed directly to Ipopt) which is significantly faster than any other means of solving the model (10x speedup). However, with `cross_good_congestion = true`, the dual solution may be inaccurate. This may be fixed in the future.  
+
 # 0.1.6
+
 ## Breaking Changes
 * All spatial parameters, including `Lj`, `Lr`, `Hj`, `hj`, `Zjn`, `omegaj`, `omegar`, and `region` are now stored in the `graph` structure created by `create_graph()`. `create_graph()` therefore only returns the `graph` structure, instead of both the (updated) parameters and the graph. Converesely, `init_parameters()` only contains parameters that are independent of the particular geography defined by `create_graph()`.
 
@@ -7,7 +16,6 @@
 * Better spline options for plotting frictions surface (geography).
 * More faithful translation of `apply_geography()`. 
 
-
 # 0.1.5
 
 * Removed the MATLAB toolbox and corresponding documentation (PDF files) from the repo to decrease size. A new repo was created for the MATLAB toolbox at [SebKrantz/OptimalTransportNetworkToolbox](https://github.com/SebKrantz/OptimalTransportNetworkToolbox). This repo and especially the `docs` folder continue to be very useful for Julia users, but are no longer part of the Julia library. 

Project.toml

@@ -1,7 +1,7 @@
 name = "OptimalTransportNetworks"
 uuid = "e2b46e68-897f-4e4e-ba36-a93c9789fd96"
 authors = ["Sebastian Krantz <sebastian.krantz@graduateinstitute.ch>"]
-version = "0.1.7"
+version = "0.1.8"
 
 [deps]
 Dierckx = "39dd38d3-220a-591b-8e3c-4c3a8c710a94"