And on my right, Dr Harry Benson who's an agricultural economist.

在我右边的是哈里·本森博士，他是一位农业经济学家。

To better understand the wholesale swings, we spoke to Andrew Novakovic, an agricultural economist who's been studying these markets for over 40 years.

为了更好地理解批发市场的波动，我们采访了农业经济学家安德鲁·诺瓦科维奇，他研究这些市场已有40多年。