Oil prices should start to level out and then to slide as economies soften and the us dollar stabilises .
石油价格应该开始水平,然后随着经济的软化和美元的稳定逐步下滑。
But resources companies also face higher costs than a year or two ago so even if commodity prices level out the first half of 2008 could prove to be a high-water mark both for earnings and for share prices .