diff --git a/src/ac/ed/lurg/country/AbstractCountryAgent.java b/src/ac/ed/lurg/country/AbstractCountryAgent.java
index 2fee1dab8b8961817677f0a26e9ea11ab58e31fb..895a60e66ad95f5dc02b57c4feff98e22b5ce8ac 100644
--- a/src/ac/ed/lurg/country/AbstractCountryAgent.java
+++ b/src/ac/ed/lurg/country/AbstractCountryAgent.java
@@ -22,7 +22,7 @@ public abstract class AbstractCountryAgent {
 	protected Timestep currentTimestep;
 	protected Map<CommodityType, Map<CropType, Double>> currentMinDemandFract;
 	protected double currentGen2EcDemand;
-	private double exportTax;
+	private double exportTaxRate;
 	private Map<CropType, Double> previousProducerCropPrices;
 	protected Map<CropType, Double> currentProducerCropPrices;
 	
@@ -51,7 +51,7 @@ public abstract class AbstractCountryAgent {
 			Double tb = tradeBarriers.get(c);
 			LogWriter.println(worldPrice + " " + c);
 			double exportPrice = worldPrice.getExportPrice();
-			exportPrice *= (1 - exportTax);
+			exportPrice /= (1 + exportTaxRate);
 			
 			CountryPrice prices = new CountryPrice(worldPrice.getCountryImportPrice(tb==null ? 0 : tb, currentTimestep), exportPrice);
 			countryPrices.put(c, prices);
@@ -65,30 +65,29 @@ public abstract class AbstractCountryAgent {
 	}
 
 	protected void calculateProducerCropPrices() {
-		LogWriter.println("calculateProducerCropPrices " + country + " " + currentTimestep);
 		currentProducerCropPrices = getProducerCropPrices();
 		LogWriter.println("calculateProducerCropPrices " + country + " " + currentTimestep + " prices now " + currentProducerCropPrices);
 	}
 	
 	protected void calculateExportTax() {
-		exportTax = 0;
+		exportTaxRate = 0;
 		
 		if (previousProducerCropPrices != null) {
 			for (CropType crop : CommodityType.CEREALS.getCropTypes()) {
 				double newPrice = currentProducerCropPrices.get(crop);
 				double oldPrice = previousProducerCropPrices.get(crop);
-				if ((newPrice - oldPrice)/ oldPrice > ModelConfig.EXPORT_TAX_THRESHOLD) {
-					exportTax = ModelConfig.EXPORT_TAX_RATE;
-					LogWriter.println(String.format("calculateExportTax: Price Spike: %s: Price increased beyond threshold for %s, newPrice=%.4f, oldPrice=%.4f", country, crop, newPrice, oldPrice));
+				double priceChangeRate = (newPrice - oldPrice)/ oldPrice;
+				if (priceChangeRate > ModelConfig.EXPORT_TAX_THRESHOLD) {
+					exportTaxRate = ModelConfig.EXPORT_TAX_RATE;
+					LogWriter.println(String.format("calculateExportTax: Price Spike, %s, %d, %s, %.2f, %.6f, %.6f", country, currentTimestep.getTimestep(), crop, priceChangeRate*100, newPrice, oldPrice));
 					break;
 				}
-				else {
-					LogWriter.println(String.format("calculateExportTax: %s: Price change below threshold for %s, newPrice=%.4f, oldPrice=%.4f", country, crop, newPrice, oldPrice));
-				}
+				else
+					LogWriter.println(String.format("calculateExportTax: Price change below threshold, %s, %d, %s, %.2f, %.6f, %.6f", country, currentTimestep.getTimestep(), crop, priceChangeRate*100, newPrice, oldPrice));
 			}
 		}
 
-		LogWriter.println(String.format("calculateExportTax %s: exportTax is now %s", country, exportTax));
+		LogWriter.println(String.format("calculateExportTax %s: exportTax is now %s", country, exportTaxRate));
 	}
 	
 	protected abstract Map<CropType, Double> getProducerCropPrices();